Dissertations / Theses on the topic 'Automotive'
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Kuhlgatz, Dietrich. "Bosch Automotive." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2013. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-108346.
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Barnett, A. E. "Automotive catalysis." Thesis, Queen's University Belfast, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.419491.
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Kuhlgatz, Dietrich. "Bosch Automotive." Robert Bosch GmbH, 2011. https://slub.qucosa.de/id/qucosa%3A2905.
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Abbasi, Nisar Ahmad. "Compact automotive antennas." Thesis, University of Sheffield, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.548632.
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Hase, Yoshiko M. B. A. Massachusetts Institute of Technology. "Automotive electronics business." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/39526.
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Thesis (M.B.A.)--Massachusetts Institute of Technology, Sloan School of Management, 2007.Includes bibliographical references (leaf 96).
In the automotive industry, due to the trend to introduce active safety systems, concerns about protecting the environment, and advances in information technology, key automotive manufacturers are eager to acquire new enabling technologies which can provide solutions for these issues. As a result, the demand for automotive electronics is increasing. Meanwhile, due to strict requirements for demanding specifications, as well as low volume commitment offered by car manufacturers as compared with consumer electronics products, many electronics manufacturers have so far avoided entering this business. However, as the requirement for high technology grow, the technology of the electronics companies becomes indispensable for the car manufacturers. Currently, there are some electronics companies who provide automotive parts, mostly on the components level and not on the solution level, but only few of them are truly successful. The automotive electronics business requires various types of components as well as demanding specifications for safety and operating conditions. Offering solutions for this demanding industry often requires cross-organizational initiative.
(cont.) Despite the difficult challenges, many electronics companies, including semiconductor and fabless companies, have already penetrated into this industry, and its market is becoming more and more competitive. The purpose of this work is to discuss the potential of Toshiba Corporation to become a major player in the automotive electronics industry. While it seems to be attractive, there are also many challenges which would face Toshiba as a new player attempting to penetrate this market. The work will focus on the understanding and analysis of these challenges. The work will start from a general description of the current automotive electronics industry. Following, I will discuss the future technological trends of automotive electronic systems and the demands and requirements of the different geographical markets. Following this general background, Toshiba's current market position and a comparison to the key competitors is presented. The work will be concluded with a discussion of the optional strategies which can be adopted by Toshiba if it decides to focus on the automotive market.
by Yoshiko Hase.
M.B.A.
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Haugen, Petter. "Automotive Energy Harvesting." Thesis, Mittuniversitetet, Institutionen för elektronikkonstruktion, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-37606.
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Vibration measurements conducted in three vehicles windshields are used to determine frequency content in the windshield of moving vehicles. A piezoelectric energy harvester is modeled, and used in simulations to determine output voltage and power with measured acceleration signal as input.
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Nova, Sergio D\'Oliveira Casa. "Contribuição a metodologia de projeto e concepção automotiva." Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/3/3149/tde-12042017-085530/.
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O objetivo deste trabalho é fazer uma contribuição ao Método de Desenvolvimento Automotivo, especificamente sobre a concepção de novos produtos automotivos, por meio de uma análise crítica a partir de uma hipótese proposta de método de um estudo de caso. O estudo de temas pertinentes procurou incluir temas multidisciplinares ligados à Estética do Produto Industrial e à sua História, ao Gerenciamento de Projetos, a Metodologia de Estímulo à Criatividade, a Ergonomia e Fatores Humanos. O Método Proposto por hipótese, baseado na experiência do autor, incluiu de forma sintética quatro fases de desenvolvimento: a pesquisa, a proposição de alternativas, a definição da melhor alternativa e a execução. O estudo de caso está baseado em uma oportunidade de conceber um semi-reboque autoportante para produtos perigosos, o que permitiu que parte do método pudesse ser testada em sua eficiência. As conclusões do trabalho revelaram pontos em que a aplicação do método hipotético mostrou-se satisfatória e outros apresentou oportunidades de melhoria bem como de continuidade da pesquisa.The contents on this work it is a contribution to Development automotive Method, specific to new products concepts, through a critical investigation. The theme study case was covered multi-disciplines topics such as: Product Esthetics and History, Project Management, Methods & Creativity stimulus and Human Factors. By the hypotheses the method proposal contemplated synthetic four phase development, Research, Alternative Solutions, Definition of he Solution and the Execution solution. The base study is supported by the opportunity to design a new product: No chassis truck trailer, to transport danger liquid materials, also to try this method for efficiency. The conclusions showed several points for hypothetical method applications with a satisfactory results, it is encouraging to continue this research.
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Pereira, Fernando Domingues. "Desenvolvimento e validação experimental de modelo para cálculo e análise de confiabilidade do esforço de fechamento de portas automotivas." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/3/3151/tde-07072016-142720/.
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O trabalho apresenta também um estudo de confiabilidade e estabelece uma faixa de valores para o esforço de fechamento de portas baseado na variação de algumas componentes chaves no cálculo. A curva característica que é um dos parâmetros de saída do modelo apresenta forma extremamente próxima da medição realizada em laboratório. No Brasil, a indústria automotiva é conhecida por sua grande influência e peso na economia do país, assim como em diversos outros países. O conjunto porta na concepção do veículo é de extrema importância, visto que é região do veículo com que o consumidor trava contato primeiro. Um valor de esforço elevado para realizar a abertura e fechamento das mesmas pode levar a uma imagem indesejada pela montadora do veículo. O valor do esforço necessário para fechar a porta é um item de extrema importância, pois além de influenciar a imagem do veículo e da marca, é um item do pacote de conforto e ergonomia do veículo. O evento fechamento da porta parte do instante em que a porta está na condição aberta e seus componentes se encontram em descanso. O evento é modelado matematicamente e em planilha dinâmica admitindo como parâmetros de entrada dados específicos do veículo e seus componentes, como saída têm-se o valor da energia de fechamento de portas e a parcela de cada componente envolvido. São apresentados resultados experimentais para que o modelo seja considerado válido. Com a conclusão do modelo é possível estimar a queda de energia em função da vida de alguns componentes como a fechadura e o pacote de guarnições, bem como a influência do uso de sobreinjetados autolubrificantes na fechadura. Este trabalho contribui com os profissionais de Engenharia de Produto nas áreas de Carroceria, Mecanismos e Partes Móveis com a elaboração de uma ferramenta de cálculo para uso em qualquer fase de projeto, principalmente para estimar o valor da energia de fechamento de porta no momento de sua conceituação e até na validação de veículos protótipo.The Brazilian automotive industry is known by its great influence on the country economy, similar to several other countries. It is important to highlight the door assembly importance on the vehicle concept, as it is the first contact made to the customer. The vehicle ingress is through the side access area, established by the doors and a high door closing effort may lead to a wrong impression. The door closing effort or also known as door closing energy is an extreme importance asset, as well as influencing the image of the vehicle and the brand, it is an item of ergonomics and vehicle comfort. The automotive door closing event starts at the moment door is open and pushed to close itself. This event is math modeled and implemented as an excel dynamic calculation plan, considering as input the vehicle and components specific data, its output is the door closing effort and each components portion. It is presented a series of values so the model is considered valid. This work also presents a reliability study defining a range of experimental values for the door closing effort based on tolerances of components used in the model calculations. The characteristic curve which is one of the parameters of the model output is extremely close to the measurement performed in the laboratory. With the completion of the model is possible to estimate the energy loss due to the life of certain components such as latches and weatherstrips, and the influence of using self-lubricating over molding in the latch. This study contributes to the Product Engineering professionals in the areas of Body, Mechanisms and Body Closures, with the elaboration of a calculation tool for use in any design phase, but mostly serving to estimate the door closing effort at the moment of conception until the validation of prototype vehicles.
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Mao, Zhaoanjian, and Yang Jin. "Reverse Logistics in Automotive Indusrty : A multiple case study in automotive industry." Thesis, Högskolan i Gävle, Avdelningen för Industriell utveckling, IT och Samhällsbyggnad, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-16988.
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Van, Dyk Petrus Jakobus Schoeman. "Integrated automotive manufacturing supply." Diss., Pretoria [s.n.], 2004. http://upetd.up.ac.za/thesis/available/etd-06102005-091319.
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Ersanilli, V. "Automotive tyre fault detection." Thesis, Coventry University, 2015. http://curve.coventry.ac.uk/open/items/77d0e8a8-9b9d-4535-b961-cab355f7e3ff/1.
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The focus of the work in this thesis is concerned with the investigation and development of indirect measurement techniques. The methodology adopted is a combination of practical experimental, analytical deductive reasoning and simulation studies. This has led to proposals for a number of indirect tyre pressure monitoring systems, which are able to detect pressure loss under specific circumstances. The outcome overall is a proposal for a new supervisory system comprising of a modular framework, allowing various algorithms and techniques to be implemented in a complementary manner as they emerge and data sources become available. A number of contributions to the field have been made, which to the knowledge of the author, provide potential for further algorithm development and are imminently applicable given the above. The methods include a tyre pressure diagnosis via a wheel angular velocity comparator, the development of a model-based tyre pressure diagnosis via application of an unknown input observer and a parameter estimation scheme, a model-based tyre pressure diagnosis approach via an enhanced Kalman filter configured to estimate states including the input, a model-based tyre pressure diagnosis via cautious least squares, an investigation and critique of the effects of the choice of sampling interval on discrete-time models and estimation thereof. It is considered, that the extensive literature review provides a valuable historic insight into the tyre fault detection problem. It is clear, from the development and testing of the algorithms (and also the literature), that no single indirect pressure detection method is able to reliably detect changes in all driving scenarios which the regulations typically stipulate (depending on jurisdiction). In the absence of any information about the road input, the majority of the detection work must be shouldered by the wheel angular velocity comparator algorithm. As image recognition and sensor technology develops, it becomes possible to make estimates about the road surface and this removes some of the uncertainty on the input of the model-based parameter estimation approaches. Further work is detailed which goes some way towards realising the next steps in a development cycle suitable for a vehicle manufacturer to take through to the implementation stage.
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Bahrieh, Sara. "Sensor Central / Automotive Systems." Thesis, Blekinge Tekniska Högskola, Sektionen för ingenjörsvetenskap, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-6012.
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How to display objects which were detected from different devices in one coordinate system? Nowadays most vehicles are equipped with front and back sensors to help the driver in driving process. Companies who provide this technology need to have an application which enables them for easy data fusion from these sensors and recording the process. Besides sensor’s design, programming of them is an important aspect. BASELABS Connect has the solution in a user friendly way. Creating Sensor Central component for BASELABS Connect is the main goal of this thesis. Sensor Central from BASELABS Connect requires six variables of sensor’s position for each sensor to demonstrate the objects from all sensors to one unique coordinate system. In this thesis, it was intended to create such a component which was mounted between all the sensors and the charting component to convert the objects location from different sensor’s position to one coordinate system and to be usable from other vehicles too.www.baselabs.de
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Kees, Markus. "Intelligent automotive braking system." Thesis, Coventry University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.247240.
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Heelan, Philip. "Automotive weather sensing systems." Thesis, University of Dundee, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.537527.
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Tan, Yiping. "Automotive diesel turbocharger investigation." Thesis, University of Bath, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.437605.
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Flint, James Alan. "Efficient automotive electromagnetic modelling." Thesis, Loughborough University, 2000. https://dspace.lboro.ac.uk/2134/33758.
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The Transmission Line Modelling (TLM) method is applied to the electromagnetic modelling of vehicles. Implications of increasing frequencies in computer models of electromagnetic compatibility (EMC) studies are discussed. Efficient algorithms and resource management strategies are developed With a view to producing accurate results m a realistic computational run time. Theoretical aspects covered are: (1) the development and accuracy of the TLM method; (2) an improved Partial Huygens' surface for plane wave excitation; (3) an evaluation of high-performance local and global absorbing boundary conditions. Implementation aspects of TLM addressed include: (1) the effects of arithmetic precision on link line voltage and stub impedance calculations; (2) the development of an object-oriented computer code using the Object Modelling Technique; (3) methods for estimating and managing the memory requirement and run lime of simulations. It is shown that by optimizing algorithms and carefully managing resources, sufficient improvement can be made to allow relatively sophisticated models to be run on a modest desktop computer.
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Tönnis, Marcus. "Towards automotive augmented reality." kostenfrei, 2008. http://mediatum2.ub.tum.de/node?id=652549.
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Haeberlin, Marc W. "Adaptive Automotive Lighting Systems." DigitalCommons@CalPoly, 2015. https://digitalcommons.calpoly.edu/theses/1480.
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Over the past few years, the use of LEDs within the automotive and avionic industries has increased due to their high efficiency, durability and wide range of light brightness. As the use of LEDs within these industries grows, a need for reliable, high performance drivers becomes more relevant. Companies are implementing LEDs for applications involving adaptive lighting or simple dimming features. This thesis shows implementation of various non-isolated analog converters integrated with digital dimmers to achieve these adaptive lighting systems. Adaptive lighting systems involve reading an input from an external source (brake pedal or steering wheel) and changing the brightness and/or pattern of the brake/headlights to convey more information to the driver and their surroundings. The analog converters will implement Linear Technology’s LED driver IC’s, while the digital dimmers comprise of microcontrollers and discrete components. The design, simulation, and hardware verification will showcase the abilities of these analog converters. Results will demonstrate the proposed applications for both adaptive front and brake lighting.
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Davoli, Alessandro <1994>. "Automotive Radars:towards smarter vehicles." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2022. http://amsdottorato.unibo.it/10025/1/davoli_alessandro_tesi.pdf.
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Radars are expected to become the main sensors in various civilian applications, especially
for autonomous driving. Their success is mainly due to the availability of low
cost integrated devices, equipped with compact antenna arrays, and computationally
efficient signal processing techniques. This thesis focuses on the study and the development
of different deterministic and learning based techniques for colocated multiple-input
multiple-output (MIMO) radars. In particular, after providing an overview on the
architecture of these devices, the problem of detecting and estimating multiple targets
in stepped frequency continuous wave (SFCW) MIMO radar systems is investigated and
different deterministic techniques solving it are illustrated. Moreover, novel solutions,
based on an approximate maximum likelihood approach, are developed. The accuracy
achieved by all the considered algorithms is assessed on the basis of the raw data
acquired from low power wideband radar devices. The results demonstrate that the
developed algorithms achieve reasonable accuracies, but at the price of different computational
efforts. Another important technical problem investigated in this thesis concerns
the exploitation of machine learning and deep learning techniques in the field of
colocated MIMO radars. In this thesis, after providing a comprehensive overview of the
machine learning and deep learning techniques currently being considered for use in
MIMO radar systems, their performance in two different applications is assessed on the
basis of synthetically generated and experimental datasets acquired through a commercial
frequency modulated continuous wave (FMCW) MIMO radar. Finally, the application
of colocated MIMO radars to autonomous driving in smart agriculture is illustrated.
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Kolo, Emmanuel. "Does Automotive Service Excellence (ASE) Certification Enhance Job Performance of Automotive Service Technicians?" Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/26646.
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The purpose of this study was to determine if Automotive Service Excellence (ASE) certification of automotive service technicians in independent dealerships enhanced job performance. Descriptive survey methodology was used to gather information for 100 automotive technicians (50 ASE-certified and 50 non-certified technicians) located in 50 different work sites. Each siteâ s service manager was asked to complete a questionnaire and a rating scale for two technicians, one ASE certified and one non-certified. The questionnaire was designed using expert opinions of automotive service managers and community college automotive instructors in the Triad area of North Carolina. The 28-item Minnesota Satisfactoriness Scales (MSS) were used to assess job satisfactoriness. Responses to 95 completed questionnaires and accompanying MSS were included in statistical analyses. The role of these variables in predicting ratings of job performance was further examined by including the regression analyses of only those who had four or less years of on-the-job experience. Among certified technicians, higher scale scores and longer years of experience positively predicted ratings of job performance, as well as decreased numbers of customer complaints. Overall, certified technicians had higher mean job performance ratings than non-certified technicians. Attendance and employee recognition did not significantly predict ratings of job performance in either category of technicians. Results indicated that the number of technicians receiving customer complaints was directly dependent on certification status. Variables such as awards and number of months of perfect attendance had minimal effect on both categories of technician job performance rating.Ph. D.
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Islas, Munoz Juan. "Automotive design aesthetics: Harmony and its influence in semantic perception." University of Cincinnati / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1367941397.
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Schulz, Andreas <1992>. "Electrification in the automotive industry: the changing automotive environment and new value creation potential." Master's Degree Thesis, Università Ca' Foscari Venezia, 2020. http://hdl.handle.net/10579/17066.
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The goal of this thesis is to illustrate the impact of electrification on the automotive industry and particularly German Original Equipment Manufacturers (OEMs). An introduction to various types of innovation is given in order to highlight the disruptive nature of the electrification of the powertrain.
Qualitative interviews with a political representative and representatives of German OEMs were used to analyze the changing environment in the automotive industry. The analysis of the political, competitive, technological and societal environment of the automotive industry shows the major trends that push electrification. Emissions standards, the growing competitive threat from China, technological advancements in the field of battery technology and a shift towards more ecological awareness are major factors that will lead to the widespread adoption of battery electric vehicles (BEVs).
The results of the interviews were also used to analyze the traditional automotive value chain and to illustrate the changes set off by the process of electrification. The OEMs’ share in total value creation of a BEV will be lower than it currently is for an internal combustion engine vehicle (ICEV), if no significant investments are made to build up in-house competencies, e.g. in the field of manufacturing battery cells. The downstream stages of the automotive value chain, however, offer OEMs the chance to tap new business segments and to become mobility service providers.
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Junior, Valter Sequero Prieto. "Projetos automotivos: proposta para redução de tempo de desenvolvimento." Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/3/3149/tde-25042003-080641/.
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O presente trabalho destina-se a resumir o processo de desenvolvimento de automóveis, mostrando os vários itens que influenciam na velocidade deste desenvolvimento, e propor uma base de raciocínio para se diminuir o tempo total para o projeto.The present volume is destined to summarize the development process of automobiles, showing the many items responsible for speed up this development, and make a proposal for a thinking basis to shorten development time.
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MacCrimmon, Donald. "Automotive brake wear debris analysis /." Available to subscribers only, 2009. http://proquest.umi.com/pqdweb?did=1791982261&sid=5&Fmt=2&clientId=1509&RQT=309&VName=PQD.
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Lundquist, Christian. "Sensor Fusion for Automotive Applications." Doctoral thesis, Linköpings universitet, Reglerteknik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-71594.
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Mapping stationary objects and tracking moving targets are essential for many autonomous functions in vehicles. In order to compute the map and track estimates, sensor measurements from radar, laser and camera are used together with the standard proprioceptive sensors present in a car. By fusing information from different types of sensors, the accuracy and robustness of the estimates can be increased. Different types of maps are discussed and compared in the thesis. In particular, road maps make use of the fact that roads are highly structured, which allows relatively simple and powerful models to be employed. It is shown how the information of the lane markings, obtained by a front looking camera, can be fused with inertial measurement of the vehicle motion and radar measurements of vehicles ahead to compute a more accurate and robust road geometry estimate. Further, it is shown how radar measurements of stationary targets can be used to estimate the road edges, modeled as polynomials and tracked as extended targets. Recent advances in the field of multiple target tracking lead to the use of finite set statistics (FISST) in a set theoretic approach, where the targets and the measurements are treated as random finite sets (RFS). The first order moment of a RFS is called probability hypothesis density (PHD), and it is propagated in time with a PHD filter. In this thesis, the PHD filter is applied to radar data for constructing a parsimonious representation of the map of the stationary objects around the vehicle. Two original contributions, which exploit the inherent structure in the map, are proposed. A data clustering algorithm is suggested to structure the description of the prior and considerably improving the update in the PHD filter. Improvements in the merging step further simplify the map representation. When it comes to tracking moving targets, the focus of this thesis is on extended targets, i.e., targets which potentially may give rise to more than one measurement per time step. An implementation of the PHD filter, which was proposed to handle data obtained from extended targets, is presented. An approximation is proposed in order to limit the number of hypotheses. Further, a framework to track the size and shape of a target is introduced. The method is based on measurement generating points on the surface of the target, which are modeled by an RFS. Finally, an efficient and novel Bayesian method is proposed for approximating the tire radii of a vehicle based on particle filters and the marginalization concept. This is done under the assumption that a change in the tire radius is caused by a change in tire pressure, thus obtaining an indirect tire pressure monitoring system. The approaches presented in this thesis have all been evaluated on real data from both freeways and rural roads in Sweden.SEFS -- IVSS
VR - ETT
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Alriksson, Kristofer. "Automotive rearview mirror in plastic." Thesis, KTH, Skolan för kemivetenskap (CHE), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-33042.
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The purpose of this thesis work was to carry out initial studies on Scania’s possibility to have plastic rearview mirror glasses as that for example may reduce costs and problems for Scania’s customers and enable another design of the mirror assembly. It was performed by studying the legislative and Scania demands regarding rearview mirrors to write a test program, find and order plastic mirrors, and then perform the tests and evaluate the mirrors to see if they seem good enough for Scania’s trucks. A Scania technical regulation for rearview mirror glass was also written. The tested mirrors were a Scania glass mirror as reference, a PC mirror from Sabic, a PC and a PMMA mirror from Specchidea, a mirror from SMR automotive, an ABS mirror from Ficocipa/Renault, an ABS mirror from Ford and a PC plastic from Bayer and they were tested for scratch resistance, temperature variations, impact resistance, corrosion and chemical resistance in that order. If a sample did not pass a certain test, it was not subjected to the next one. Of all samples it was only the SMR mirror and the reference glass mirror that passed the first test (scratch resistance). The others became too scratched and were not tested further. The SMR and the glass mirror also withstood all the following tests very good, the SMR mirror was the best one of the tested mirrors. Probably the SMR mirror was the best one because many of the other mirrors did not seem to have been made for outdoor conditions and because it seemed to be the most modern mirror with a good abrasion resistant coating. It was concluded that there is a future for plastic mirror glasses, that it would be interesting to do more tests on the mirrors, for example a UV test and a distortion test, and to test more mirrors as a new generation of plastic mirror glass seem to be underway. It would also be interesting to know how much cheaper and lighter the whole mirror assembly can become by changing to plastic mirror glass, which weighs 68% less than a glass mirror.
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Zhenrui, Wang. "Noise Radiation from Automotive Turbochargers." Thesis, KTH, Farkost och flyg, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-39473.
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Turbochargers are now commonly used in modern automotive engines, which increase the density of air entering the engine to produce more power. This device not only greatly improves the degree of engine efficiency, but also reduces the pollutant emissions. However, one of the important issues which must be considered is the noise from turbochargers. This noise can radiate either after propagation through the intake and exhaust ducts or via induced vibrations in the turbocharger housing. Here the in duct sound will be studied and normally this cause problems mainly on the intake side where there is less silencing available. In particular noise from high frequency tones as well as surge noise phenomena can cause noise problems.The main aerodynamic noise from centrifugal compressors are blade tone noise, buzz-saw noise and flow separation (or surge) noise. For instance the tones occurring at blade passing frequencies can be a problem for large turbochargers,e.g., as found on trucks, where they lie in the range around 10 kHz. The most efficient way to achieve quieter machines is the reduction of the sources, therefore it is important to be able to measure and investigate the sound generation ofturbo chargers.In this thesis work the sound generated has been investigated using a dedicated turbocharger acoustic test rig. The main purpose is to investigate methods for estimating the in-duct acoustic power using a micro-phone array. Three differen tmodels are proposed to estimate the power in the propagating acoustic modes and to suppress the flow noise. In order to test the proposed methods experiments have been performed on an automotive compressor at four different operating conditions. The results are compared with the literature in order to identify the dominating sound generation mechanisms.
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Pedigo, Jeremy. "Chemistry and the Automotive Industry." TopSCHOLAR®, 2008. http://digitalcommons.wku.edu/theses/372.
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This thesis covers the use of chemistry in the automotive industry with emphasis on environmental compliance via chemical reporting by database and internal Energy Dispersive X-ray Fluorescence (XRF) screening, third party laboratory material testing, and the future of the chemist in the United States (U.S.) automotive industry. The third party testing was performed at Western Kentucky University (WKU) via the Materials Characterization Center (MCC), Institute for Combustion Science and Environmental Technology (ICSET) Thermodynamics Laboratory, and using the Scanning Electron Microscope/Energy Dispersive X-ray Spectrometer (SEM/EDX) managed by the WKU Biotechnology Center. Furthermore, the tests conducted were used to investigate material defects, provide solid third party quantitative results to support our XRF screenings to ensure environmental compliance, and determine cost effective material replacements. The company for which the testing was performed and information obtained is involved with the production of electronics for many of the major automotive companies throughout the world. The company specializes in the production of wiring harnesses, electrical control units (ECU), boxes (junction, fuse, relay, etc), and electrical components. These four areas control everything from the vehicle's lights, CD/DVD player, and heater to windows, locks, and navigation system. The automotive industry is extremely competitive; therefore, each company must continually change and improve in order to survive. New materials are constantly required to meet the reduced costs implemented by the customer, as well as, improve the function and quality of the components, while maintaining compliance with global environmental standards.
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Kranz, Jürgen. "Intelligent automotive thermal comfort control." Thesis, Nelson Mandela Metropolitan University, 2011. http://hdl.handle.net/10948/1435.
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Mobility has become a substantial part in our society. Since we spend a lot of our available time on the road, we expect the automotive environment to provide similar comfort levels than residential buildings. Within this context, this research thesis especially focuses on automotive thermal comfort control. The automotive cabin is a very special environment, which is characterized by extreme inhomogeneity and overall transient behavior. Thermal comfort is a very vague and a very subjective term, which depends on physiological and psychological variables. Theories for thermal comfort in transient environments have not been fully established yet and researchers are still busy with its investigation. At present, automotive industry relies on extensive thermal comfort models, manikins and powerful simulation tools to assess and control thermal comfort. This thesis studies the application of artificial intelligence and proposes a blackbox approach which aims for extracting thermal comfort knowledge directly from human's interaction with the HVAC controls. This methodology avoids the use of human physiological and psychological thermal comfort models and does not require any a-priori knowledge. A novel comfort acquisition tool has been developed and has been integrated into a research vehicle in order to gather the required data for system learning. Data has been collected during spring, autumn and summer conditions in Southern Africa. Methods of data mining have been applied and an intelligent implementation using artificial neural networks has been proposed. The achieved results are promising and allow for about 87 perecent correct classification. It is concluded that methods of artificial intelligence perform well and are far superior compared to conventional approaches. These methods can be used as a powerful tool for the development process of vehicle air-conditioning controls and have great potential for time and cost reduction.
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Powale, Kalkin. "Automotive Powertrain Software Evaluation Tool." Master's thesis, Universitätsbibliothek Chemnitz, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-233186.
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The software is a key differentiator and driver of innovation in the automotive industry. The major challenges for software development are increasing in complexity, shorter time-to-market, increase in development cost and demand of quality assurance. The complexity is increasing due to emission legislations, variants of product and new communication technologies being interfaced with the vehicle. The shorter development time is due to competition in the market, which requires faster feedback loops of verification and validation of developed functionalities. The increase in development cost is contributed by two factors; the first is pre-launch cost, this involves the cost of error correction in development stages. Another is post-launch cost; this involves warranty and guarantees cost. As the development time passes the cost of error correction also increases. Hence it is important to detect the error as early as possible. All these factors affect the software quality; there are several cases where Original Equipment Manufacturer (OEM) have callbacks their product because of the quality defect. Hence, there is increased in the requirement of software quality assurance. The solution for these software challenges can be the early quality evaluation in continuous integration framework environment. The most prominent in today\'s automotive industry AUTomotive Open System ARchitecture (AUTOSAR) reference architecture is used to describe software component and interfaces. AUTOSAR provides the standardised software component architecture elements. It was created to address the issues of growing complexity; the existing AUTOSAR environment does have software quality measures, such as schema validations and protocols for acceptance tests. However, it lacks the quality specification for non-functional qualities such as maintainability, modularity, etc. The tool is required which will evaluate the AUTOSAR based software architecture and give the objective feedback regarding quality. This thesis aims to provide the quality measurement tool, which will be used for evaluation of AUTOSAR based software architecture. The tool reads the AUTOSAR architecture information from AUTOSAR Extensible Markup Language (ARXML) file. The tool provides configuration ability, continuous evaluation and objective feedback regarding software quality characteristics. The tool was utilised on transmission control project, and results are validated by industry experts.
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Iqbal, Muhammad Usman Surveying & Spatial Information Systems Faculty of Engineering UNSW. "Location privacy in automotive telematics." Publisher:University of New South Wales. Surveying & Spatial Information Systems, 2009. http://handle.unsw.edu.au/1959.4/43807.
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The convergence of transport, communication, computing and positioning technologies has enabled a smart car revolution. As a result, pricing of roads based on telematics technologies has gained significant attention. While there are promised benefits, systematic disclosure of precise location has the ability to impinge on privacy of a special kind, known as location privacy. The aim of this thesis is to provide technical designs that enhance the location privacy of motorists without compromising the benefits of accurate pricing. However, this research looks beyond a solely technology-based solution, For example, the ethical implications of the use of GPS data in pricing models have not been fully understood. Likewise. minimal research exists to evaluate the technical vulnerabilities that could be exploited to avoid criminal or financial penalties. To design a privacy-aware system, it is important to understand the needs of the stakeholders, most importantly the motorists. Knowledge about the anticipated privacy preferences of motorists is important in order to make reasonable predictions about their future willingness to adopt these systems. There is limited research so far Otl user perceptions regarding specific payment options in the uptake of privacy-aware systems. This thesis provides a critical privacy assessment of two mobility pricing systems, namely electronic tolls and mobility-priced insurance. As a result of this assessment. policy recommendations arc developed which could support a common approach in facilitating privacy-aware mobility-pricing strategies. This thesis also evaluates the existing and potential inferential threats and vulnerabilities to develop security and privacy recommendations for privacy-aware pricing designs for tolls and insurance. Utilising these policy recommendations and analysing user-perception with regards to the feasibility of sustaining privacy and willingness to pay for privacy, two privacy-aware mobility pricing designs have been presented which bridge the entire array of privacy interests and bring them together into a unified approach capable of sustaining legal protection as well as satisfying privacy requirements of motorists. It is maintained that it is only by social and technical analysis working in tandem that critical privacy issues in relation to location can be addressed.
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Diekmann, Christian. "Portfolio risk in automotive finance /." Norderstedt : Books on Demand, 2007. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=016495418&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.
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Schmidgall, Ralf. "Automotive embedded systems software reprogramming." Thesis, Brunel University, 2012. http://bura.brunel.ac.uk/handle/2438/7070.
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The exponential growth of computer power is no longer limited to stand alone computing systems but applies to all areas of commercial embedded computing systems. The ongoing rapid growth in intelligent embedded systems is visible in the commercial automotive area, where a modern car today implements up to 80 different electronic control units (ECUs) and their total memory size has been increased to several hundreds of megabyte. This growth in the commercial mass production world has led to new challenges, even within the automotive industry but also in other business areas where cost pressure is high. The need to drive cost down means that every cent spent on recurring engineering costs needs to be justified. A conflict between functional requirements (functionality, system reliability, production and manufacturing aspects etc.), testing and maintainability aspects is given. Software reprogramming, as a key issue within the automotive industry, solve that given conflict partly in the past. Software Reprogramming for in-field service and maintenance in the after sales markets provides a strong method to fix previously not identified software errors. But the increasing software sizes and therefore the increasing software reprogramming times will reduce the benefits. Especially if ECU’s software size growth faster than vehicle’s onboard infrastructure can be adjusted. The thesis result enables cost prediction of embedded systems’ software reprogramming by generating an effective and reliable model for reprogramming time for different existing and new technologies. This model and additional research results contribute to a timeline for short term, mid term and long term solutions which will solve the currently given problems as well as future challenges, especially for the automotive industry but also for all other business areas where cost pressure is high and software reprogramming is a key issue during products life cycle.
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Loehmann, Sebastian. "Experience Prototyping for Automotive Applications." Diss., Ludwig-Maximilians-Universität München, 2015. http://nbn-resolving.de/urn:nbn:de:bvb:19-180801.
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In recent years, we started to define our life through experiences we make instead of objectswe buy. To attend a concert of our favorite musician may be more important for us thanowning an expensive stereo system. Similarly, we define interactive systems not only by thequality of the display or its usability, but rather by the experiences we can make when usingthe device. A cell phone is primarily built for making calls and receiving text messages,but on an emotional level it might provide a way to be close to our loved ones, even thoughthey are far away sometimes. When designing interactive technology, we do not only haveto answer the question how people use our systems, but also why they use them. Thus,we need to concentrate on experiences, feelings and emotions arising during interaction.Experience Design is an approach focusing on the story that a product communicates beforeimplementing the system.
In an interdisciplinary team of psychologists, industrial designers, product developers andspecialists in human-computer interaction, we applied an Experience Design process to theautomotive domain. A major challenge for car manufacturers is the preservation of theseexperiences throughout the development process. When implementing interactive systemsengineers rely on technical requirements and a set of constraints (e.g., safety) oftentimescontradicting aspects of the designed experience. To resolve this conflict, Experience Prototypingis an important tool translating experience stories to an actual interactive product.
With this thesis I investigate the Experience Design process focusing on Experience Prototyping.Within the automotive context, I report on three case studies implementing threekinds of interactive systems, forming and following our approach. I implemented (1) anelectric vehicle information system called Heartbeat, communicating the state of the electricdrive and the batteries to the driver in an unobtrusive and ensuring way. I integrated Heartbeatinto the dashboard of a car mock-up with respect to safety and space requirements butat the same time holding on to the story in order to achieve a consistent experience. With (2)the Periscope I implemented a mobile navigation device enhancing the social and relatednessexperiences of the passengers in the car. I built and evaluated several experience prototypesin different stages of the design process and showed that they transported the designed experiencethroughout the implementation of the system. Focusing on (3) the experience offreehand gestures, GestShare explored this interaction style for in-car and car-to-car socialexperiences. We designed and implemented a gestural prototypes for small but effectivesocial interactions between drivers and evaluated the system in the lab and and in-situ study.
The contributions of this thesis are (1) a definition of Experience Prototyping in the automotivedomain resulting from a literature review and my own work, showing the importanceand feasibility of Experience Prototyping for Experience Design. I (2) contribute three casestudies and describe the details of several prototypes as milestones on the way from a anexperience story to an interactive system. I (3) derive best practices for Experience Prototypingconcerning their characteristics such as fidelity, resolution and interactivity as well asthe evaluation in the lab an in situ in different stages of the process.Wir definieren unser Leben zunehmend durch Dinge, die wir erleben und weniger durchProdukte, die wir kaufen. Ein Konzert unseres Lieblingsmusikers zu besuchen kann dabeiwichtiger sein, als eine teure Stereoanlage zu besitzen. Auch interaktive Systeme bewertenwir nicht mehr nur nach der Qualität des Displays oder der Benutzerfreundlichkeit, sondernauch nach Erlebnissen, die durch die Benutzung möglich werden. Das Smartphone wurdehauptsächlich zum Telefonieren und Schreiben von Nachrichten entwickelt. Auf einer emotionalenEbene bietet es uns aber auch eine Möglichkeit, wichtigen Personen sehr nah zusein, auch wenn sie manchmal weit weg sind. Bei der Entwicklung interaktiver Systememüssen wir uns daher nicht nur fragen wie, sondern auch warum diese benutzt werden. Erlebnisse,Gefühle und Emotionen, die während der Interaktion entstehen, spielen dabei einewichtige Rolle. Experience Design ist eine Disziplin, die sich auf Geschichten konzentriert,die ein Produkt erzählt, bevor es tatsächlich implementiert wird. In einem interdisziplinären Team aus Psychologen, Industrie-Designern, Produktentwicklernund Spezialisten der Mensch-Maschine-Interaktion wurde ein Prozess zur Erlebnis-Gestaltung im automobilen Kontext angewandt. Die Beibehaltung von Erlebnissen über dengesamten Entwicklungsprozess hinweg ist eine große Herausforderung für Automobilhersteller.Ingenieure hängen bei der Implementierung interaktiver Systeme von technischen,sicherheitsrelevanten und ergonomischen Anforderungen ab, die oftmals dem gestaltetenErlebnis widersprechen. Die Bereitstellung von Erlebnis-Prototypen ermöglicht die Übersetzungvon Geschichten in interaktive Produkte und wirkt daher diesem Konflikt entgegen. Im Rahmen dieser Dissertation untersuche ich den Prozess zur Erlebnis-Gestaltung hinsichtlichder Bedeutung von Erlebnis-Prototypen. Ich berichte von drei Fallbeispielen im automobilenBereich, die die Gestaltung und Implementierung verschiedener interaktiver Systemenumfassen. (1) Ein Informationssystem für Elektrofahrzeuge, der Heartbeat, macht den Zustanddes elektrischen Antriebs und den Ladestand der Batterien für den Fahrer visuell undhaptisch erlebbar. Nach der Implementierung mehrerer Prototypen wurde Heartbeat unterBerücksichtigung verschiedener technischer und sicherheitsrelevanter Anforderungen in dieArmaturen eines Fahrzeugmodells integriert, ohne dass dabei das gestaltete Erlebnis verlorengegangen ist. (2) Das Periscope ist ein mobiles Navigationsgerät, das den Insassensoziale Erlebnisse ermöglicht und das Verbundenheitsgefühl stärkt. Durch die Implementierungmehrere Erlebnis-Prototypen und deren Evaluation in verschiedenen Phasen des Entwicklungsprozesseskonnten die gestalteten Erlebnisse konsistent erhalten werden. (3) ImProjekt GestShare wurde das Potential der Interaktion durch Freiraumgesten im Fahrzeuguntersucht. Dabei standen ein Verbundenheitserlebnis des Fahrers und soziale Interaktionenmit Fahrern anderer Fahrzeuge im Fokus. Es wurden mehrere Prototypen implementiert undauch in einer Verkehrssituation evaluiert. Die wichtigsten Beiträge dieser Dissertation sind (1) eine intensive Betrachtung und Anwendungvon Erlebnis-Prototypen im Auto und deren Relevanz bei der Erlebnis-Gestaltung,beruhend auf einer Literaturauswertung und der eigenen Erfahrung innerhalb des Projekts; (2) drei Fallstudien und eine detaillierte Beschreibung mehrere Prototypen in verschiedenenPhasen des Prozesses und (3) Empfehlungen zu Vorgehensweisen bei der Erstellung vonErlebnis-Prototypen hinsichtlich der Eigenschaften wie Nähe zum finalen Produkt, Anzahlder implementierten Details und Interaktivität sowie zur Evaluation im Labor und in tatsächlichenVerkehrssituationen in verschiedenen Phasen des Entwicklungsprozesses.
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Rivett, Roger. "Automotive mechatronic safety argument framework." Thesis, University of York, 2018. http://etheses.whiterose.ac.uk/22612/.
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A modern vehicle uses mechanical components under software control, referred to as mechatronic systems, to deliver its features. The software for these, and its supporting hardware, are typically developed according to the functional safety standard ISO 26262:2011. This standard requires that a safety argument is created that demonstrates that the safety requirements for an item are complete and satisfied by evidence. However, this argument only addresses the software and electronic hardware aspects of the mechatronic system, although safety requirements derived for these can also be allocated to the mechanical part of the mechatronic system. The safety requirements allocated to hardware and software also have a value of integrity assigned to them based on an assessment of the unmitigated risk. The concept of risk and integrity is expressed differently in the development of the mechanical components. In this thesis, we address the challenge of extending the safety argument required by ISO 26262 to include the mechanical components being controlled, so creating a safety argument pattern that encompasses the complete mechatronic system. The approach is based on a generic model for engineering which can be applied to the development of the hardware, software and mechanical components. From this, a safety argument pattern has been derived which consequently can be applied to all three engineering disciplines of the mechatronic system. The harmonisation of the concept of integrity is addressed through the use of special characteristics. The result is a model-based assurance approach which allows an argument to be constructed for the mitigation of risk associated with a mechatronic system that encompasses the three engineering disciplines of the system. This approach is evaluated through interview-based case studies and the retrospective application of the approach to an existing four corner air suspension system.
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Bulusu, Vinod, and Haekyun Kim. "Improving automotive battery sales forecast." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/99806.
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Thesis: M. Eng. in Logistics, Massachusetts Institute of Technology, Engineering Systems Division, 2015.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 54-55).
Improvement in sales forecasting allows firms not only to respond quickly to customers' needs but also to reduce inventory costs, ultimately increasing their profits. Sales forecasts have been studied extensively to improve their accuracy in many different fields. However, for automotive batteries, it is very difficult to develop a highly accurate forecast model because many variables need to be considered and their correlations are complex. Additionally, current sales forecasts are derived from historical data and thus do not include any other causal factor analysis. In this study we applied causal factor analysis to determine how the forecast accuracy could be improved. We focused on understanding the relationship between temperature and sales. Using regression modelling, we found that there is a quadratic relationship between temperature and battery sales. We validated the model by comparing the actual and predicted sales for various geographies and times. We concluded that the model is more robust for predicting sales across various times than through various geographies.
by Vinod Bulusu and Haekyun Kim.
M. Eng. in Logistics
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Fussey, Peter Michael. "Automotive combustion modelling and control." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:ec66cbb1-407e-431c-bd77-e67bcf33be3a.
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This thesis seeks to bring together advances in control theory, modelling and controller hardware and apply them to automotive powertrains. Automotive powertrain control is dominated by PID controllers, look-up tables and their derivatives. These controllers have been constantly refined over the last two decades and now perform acceptably well. However, they are now becoming excessively complicated and time consuming to calibrate. At the same time the industry faces ever increasing pressure to improve fuel consumption, reduce emissions and provide driver responsiveness. The challenge is to apply more sophisticated control approaches which address these issues and at the same time are intuitive and straightforward to tune for good performance by calibration engineers. This research is based on a combustion model which, whilst simplified, facilitates an accurate estimate of the harmful NOx and soot emissions. The combustion model combines a representation of the fuel spray and mixing with charge air to give a time varying distribution of in-cylinder air and fuel mixture which is used to calculate flame temperatures and the subsequent emissions. A combustion controller was developed, initially in simulation, using the combustion model to minimise emissions during transient manoeuvres. The control approach was implemented on an FPGA exploiting parallel computations that allow the algorithm to run in real-time. The FPGA was integrated into a test vehicle and tested over a number of standard test cycles demonstrating that the combustion controller can be used to reduce NOx emissions by over 10% during the US06 test cycle. A further use of the combustion model was in the optimisation of fuel injection parameters to minimise fuel consumption, whilst delivering the required torque and respecting constraints on cylinder pressure (to preserve engine integrity) and rate of increase in cylinder pressure (to reduce noise).
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Ruddle, Alastair Richmond. "Validation of automotive electromagnetic models." Thesis, Loughborough University, 2002. https://dspace.lboro.ac.uk/2134/35592.
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The problems of modelling the electromagnetic characteristics of vehicles and the experimental validation of such models are considered. The validity of the measurement methods that are applied in model validation exercises is of particular concern. A philosophy for approaching the validation of automotive electromagnetic models of realistic complexity is presented. Mathematical modelling of the key elements of the measurement processes is proposed as the only reliable mechanism for addressing these issues. Areas considered include: basic elements of numerical models; geometrical fidelity requirements for model elements; calibration and use of experimental transducers; the inclusion of cables in electromagnetic models; essential content for vehicle models. A number of practical measurement processes are also investigated using numerical methods, leading to recommendations for improved practices in: calibration of transducers for current measurement at high frequencies; measurement of radiated emissions from vehicles; identification of range requirements for simple methods of determining antenna gain and related characteristics in EMC test facilities. The impact of such measures on the success of model validation studies for automotive applications is demonstrated. It is concluded that experimental results are no less in need of validation than the numerical results that are, more conventionally, judged against them.
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De, Crescenzo Dania. "Radar perimetrali per applicazioni automotive." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/24529/.
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Il lavoro di tesi consiste in uno studio sperimentale inerente il radar a onda continua modulata in frequenza (frequency modulated continuous wave radar – FMCW), trattando nello specifico il modello di radar BGT60ATR24C di Infineon, pensato per applicazioni di tipo automobilistico a corto raggio. L’obiettivo finale è quello di eseguire il mapping 3D tramite segnali radar, per ottenere una rappresentazione dell’ambiente statico circostante il veicolo su cui si trova il sensore, al fine di supportare l’implementazione di applicazioni volte a identificare ostacoli presenti attorno all’auto. L’attività di tesi è organizzata come segue. Il capitolo 1 presenta una breve introduzione ai principi della tecnologia radar, ponendo particolare attenzione sui dispositivi FMCW. Nel capitolo 2 si esamina il problema del mapping tramite segnali radar, valutando diversi approcci alla costruzione della mappa e accennando al mapping collaborativo. Ci si concentra soprattutto sul mapping probabilistico a griglia di occupazione, tecnica che verrà poi applicata ai dati ottenuti sperimentalmente. Nel capitolo 3 si fornisce una descrizione generale del radar BGT60ATR24C a disposizione, si illustrano i parametri di controllo e la configurazione scelta per eseguire le acquisizioni sul campo. Il capitolo 4 riguarda la campagna sperimentale, divisa in esperimenti preliminari in ambiente controllato ed esperimenti in uno scenario statico automobilistico reale. Nel capitolo 5 verrà infine illustrata l’elaborazione Matlab dei dati sperimentali raccolti, arrivando alla produzione di una mappa 3D che rappresenta probabilisticamente lo spazio osservato da due radar posizionati sulla fiancata di un’automobile. Le misurazioni effettuate dai due sensori sul medesimo scenario statico verranno quindi fuse in un’unica rappresentazione dell’ambiente, in modo da aumentare l’accuratezza e l’affidabilità della mappa rispetto al caso in cui si utilizzi un unico dispositivo di rilevamento.
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Vyas, Saurabh, and Venkata Dinesh Raju Jonnalagadda. "Modelling of Automotive Suspension Damper." Thesis, KTH, Fordonsdynamik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-293498.
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A hydraulic damper plays an important role in tuning the handling and comfort characteristicsof a vehicle. Tuning and selecting a damper based on subjective evaluation, by considering theopinions of various users, would be an inefficient method since the comfort requirements of usersvary a lot. Instead, mathematical models of damper and simulation of these models in variousoperating conditions are preferred to standardize the tuning procedure, quantify the comfortlevels and reduce cost of testing. This would require a model, which is good enough to capture thebehaviour of damper in various operating and extreme conditions.The Force-Velocity (FV) curve is one of the most widely used model of a damper. This curve isimplemented either as an equation or as a look-up table. It is a plot between the maximum forceat each peak velocity point. There are certain dynamic phenomena like hysteresis and dependencyon the displacement of damper, which cannot be captured with a FV curve model, but are requiredfor better understanding of the vehicle behaviour.This thesis was conducted in cooperation with Volvo Cars with an aim to improve the existingdamper model which is a Force-Velocity curve. This work focuses on developing a damper model,which is complex enough to capture the phenomena discussed above and simple enough to beimplemented in real time simulations. Also, the thesis aims to establish a standard method toparameterise the damper model and generate the Force-Velocity curve from the tests performedon the damper test rig. A test matrix which includes the standard tests for parameterising andthe extreme test cases for the validation of the developed model will be developed. The final focusis to implement the damper model in a multi body simulation (MBS) software.The master thesis starts with an introduction, where the background for the project is described and then the thesis goals are set. It is followed by a literature review in which fewadvanced damper models are discussed in brief. Then, a step-by-step process of developing thedamper model is discussed along with few more possible options. Later, the construction of a testmatrix is discussed in detail followed by the parameter identification process. Next, the validationof the developed damper model is discussed using the test data from Volvo Hällered ProvingGround (HPG). After validation, implementation of the model in VI CarRealTime and Adams Caralong with the results are presented. Finally the thesis is concluded and the recommendations forfuture work are made on further improving the model.En hydraulisk stötdämpare spelar en viktig roll för att fordonets hantering och komfort. Attjustera och välja en stötdämpare baserat på subjektiv utvärdering, genom att beakta olika användares åsikter, skulle vara en ineffektiv metod eftersom användarnas komfortkrav varierarmycket. Istället föredras matematiska modeller av stötdämpare och simulering av dessa modellerunder olika driftsförhållanden för att standardisera inställningsförfarandet, kvantifiera komfortnivåerna och minska testkostnaden. Detta skulle kräva en modell som är tillräckligt bra för attfånga upp stötdämparens beteende under olika drifts- och extrema förhållanden.Force-Velocity (FV) -kurvan är en av de mest använda stötdämparmodellerna. Denna kurvaimplementeras antingen som en ekvation eller som en uppslagstabell. Det är ett diagram somredovisar den maximala kraften vid varje maxhastighetspunkt. Det finns vissa dynamiskafenomen som hysteres och beroende av stötdämparens förskjutning, som inte kan fångas med enFV-kurvmodell, men som krävs för att bättre förstå fordonets beteende.Denna avhandling genomfördes i samarbete med Volvo Cars i syfte att förbättra den befintligastötdämparmodellen som är en Force-Velocity-kurva. Detta arbete fokuserar på att utveckla enstötdämparmodell, som är tillräckligt komplex för att fånga upp de fenomen som diskuteratsovan och tillräckligt enkel för att implementeras i realtidssimuleringar. Avhandlingen syftarockså till att upprätta en standardmetod för att parametrisera spjällmodellen och generera ForceVelocity-kurvan från de test som utförts på stötdämpartestriggen. En testmatris som innehållerstandardtest för parametrisering och extrema testfall för validering av den utvecklade modellenkommer att utvecklas. Det sista fokuset är att implementera stötdämparmodellen i en multi-bodysimulation (MBS) programvara.Examensarbetet inleds med en introduktion, där bakgrunden för projektet beskrivs ochdärefter definieras målen med arbetet. Det följs av en litteraturöversikt där några avanceradestötdämparmodeller diskuteras i korthet. Därefter diskuteras en steg-för-steg-process för attutveckla stötdämparmodeller tillsammans med några fler möjliga alternativ. Senare diskuteraskonstruktionen av en testmatris i detalj följt av parameteridentifieringsprocessen. Därefterdiskuteras valideringen av den utvecklade stötdämparmodellen med hjälp av testdata från VolvoHällered Proving Ground (HPG). Efter validering presenteras implementeringen av modellen iVI CarRealTime och Adams Car tillsammans med resultaten. Slutligen avslutas rapporten medslutsatser från arbetet och rekommendationer för framtida arbete görs för att ytterligare förbättramodellen.
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Almeida, André Rodrigues. "Resource reservation in automotive ethernet." Master's thesis, Universidade de Aveiro, 2013. http://hdl.handle.net/10773/12849.
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Mestrado em Engenharia Electrónica e TelecomunicaçõesIn recent years, automotive industry has undergone major changes, being able to highlight not only the growing development of electronic systems in increasingly and varied features and contexts, as well as to cope with its growing interaction between with the driver and the outside world. Due to the huge amount of traffic involved in these system communications, networking technologies used so far are starting to be less appealing and the industry began to consider alternatives, economically more competitive as is the case of Ethernet. The use of Ethernet technology in automotive domains faces some challenges, namely with time constraints compliance and well defined resource requirements. The emergence of AVB (Audio Video Bridging) protocols, is trying to tackle some of these problems of having dynamic Quality of Service management in automotive Ethernet networks. One example of such protocols is the signalling protocol (SRP Stream Reservation Protocol), which could be used for providing a resource reservation mechanism in an automotive Ethernet domain. To test the feasibility of such recent methods, simulation tools are of paramount importance. This work presents an implementation of the SRP (Stream Reservation Protocol) in Omnet++, taking into account some of its constraints. It is described the fundamental aspects of this model implementation, as well as some functional tests.
Nos últimos anos, a industria automóvel tem sofrido grandes evoluções, podendo-se destacar não só o crescente desenvolvimento de sistemas eletrónicos em contextos e funcionalidades cada vez mais variados, como também a crescente interacção deste com o condutor e o mundo exterior. Devido ao enorme aumento de tráfego envolvido nas comunicações que compõem esses sistemas, as tecnologias de redes usadas até então deixaram de ser tão apelativas e passaram-se a considerar alternativas económicamente mais competitivas como é o caso da Ethernet. O uso de redes Ethernet em âmbito automóvel levanta alguns problemas, nomeadamente no cumprimento de limites temporais e requisitos de recursos bem definidos. O aparecimento de protocolos AVB (Audio Video Bridging) vem tentar colmatar vários problemas de gestão dinâmica de Qualidade de Serviço das redes Ethernet no domínio automóvel. O protocol de sinalização SRP (Stream Reservation Protocol) pode ser adaptado para redes Ethernet no contexto automóvel para proporcionar um mecanismo de reserva de recursos. Para testar a viabilidade de métodos tão recentes, as ferramentes de simulação são de uma importância vital. Este trabalho apresententa uma implemetação do protocolo SRP (Stream Reservation Protocol) em ambiente de simulação OMNeT++. São apresentados os aspectos fundamentais do modelo implemetado bem como alguns testes funcionais de validação deste.
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Blades, Luke Aubrey William. "Ageing mechanisms in automotive catalysts." Thesis, Queen's University Belfast, 2015. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.695255.
Full textAbstract:
This study uses a number of laboratory testing and ageing methods in order to investigate how effectively they correlate to catalyst ageing on a vehicle. The activity testing of full size catalyst bricks was successfully conducted using the Catagen Labcat test system, and correlation with the light-off activity of cored catalyst samples in the Horiba SIGU 2000 examined using the QUB global catalyst model. Static ageing was conducted in the laboratory, using the BAT equation to calculate ageing times for ageing temperatures relating to a RAT-A cycle. The thermal reactivity coefficients for static ageing in different ageing atmospheres were calculated and compared to those recommended by the EPA for dynamic ageing. Finally, using the results achieved from these raboratory ageing methods, recommendations were made as to how ageing models reviewed in the literature could be improved. From experimental results alone, it was seen that no correlation existed between the light-off performance of cored catalyst samples and full size bricks. However, the QUB global catalyst model was able to consider variations in precious metal dispersion between samples, differences between inlet temperature and gas concentrations, and heat transfer characteristics of the two reactors. The simulations performed were able to show good correlation between the test methods. However, the two tests methods showed differently the activity rank of the samples, indicating the variation in precious metal loading and dispersion throughout each full size brick. In other results, static ageing of palladium loaded catalyst samples was found to show no ageing effects due to time for ageing temperatures below 1000 C. Static ageing methods were also shown to cause deactivation at a slower rate than dynamic methods. It was shown that the Toyota ageing expression would better predict catalyst deactivation if it incorporated an oxygen factor, to describe ageing when no oxygen is present.
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Kadlecová, Petra. "Automotive Corporate Strategy in CEE." Master's thesis, Vysoká škola ekonomická v Praze, 2009. http://www.nusl.cz/ntk/nusl-10869.
Full textAbstract:
The diploma thesis shows the status of the automotive industry in the Czech Republic. It shows the trends in the Czech automotive industry in short theoretical presentation. There is a trend of the future competition from developing countries, other problems are growing raw material prices or government's limits in CO2 production. The companies connected to the automotive industry are reacting. The relevant information about the status and reactions of the Czech automotive industry companies, especially at the time of the crisis, was gained. The work answers the main question: How will the situation look like in the Czech automotive industry after the end of the crisis.
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Přibyl, Matěj. "Ocenění závodu Automotive Lighting s.r.o." Master's thesis, Vysoká škola ekonomická v Praze, 2012. http://www.nusl.cz/ntk/nusl-197095.
Full textAbstract:
The final thesis "Business valuation of the company Automotive Lighting s.r.o." is divided into the theoretical and the practical part. The theoretical part is first focused on general issues of valuation. Its following parts then theoretically describe the general method of business valuation. The practical part is dedicated to the application of methods described in the theoretical part. Only the discounted cash flow to equity method (representing income valuation methods) and the EV/EBITDA multiple method (representing market methods) are applied due to the scope of the thesis. The property approach is represented by the equity book value. The thesis concludes with the final value statement.
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Oshchebska, Sofiya. "Potential of Africa for Automotive." Master's thesis, Vysoká škola ekonomická v Praze, 2012. http://www.nusl.cz/ntk/nusl-197283.
Full textAbstract:
This thesis is dedicated to the estimation of the potential of African continent for the automotive market entry. The work starts with the introduction of key internationalization, market assessment and market entry theories. Author then conducts a general analysis of automotive industry and evaluates the competitive forces that are shaping it nowadays. The research continues with the identification and evaluation of key drivers of Africa's future growth. Final practical part of the thesis is presented in the form of comparative study of four African countries: Egypt, Morocco, South Africa and Tunisia, that according to the author present the highest market potential for automotive in Africa. Country comparison and ranking is conducted by the application of PESTLE framework. In the end Egypt is identified as a preferred country and a list of recommendations on the automotive market entry strategy for Egypt is provided.
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Agarwal, Megha, Alisha Bandekar, Ashley Kang, Tyler Martis, Hossein Namazyfard, Alan Yeh, Megha Agarwal, et al. "Automotive LiDAR Collision-Avoidance System." Thesis, The University of Arizona, 2017. http://hdl.handle.net/10150/624893.
Full textAbstract:
The project at hand is an Automotive LiDAR Collision Avoidance System sponsored by
Texas Instruments. The purpose of this project is to design and create a LiDAR system
that utilizes Texas Instruments' technology to avoid forward collisions when mounted on
a remote control car. The team is made up of six seniors from the University of Arizona
of four different engineering disciplines including electrical, mechanical, computer, and
optical engineering. The LiDAR Collision avoidance system is designed and built under a
budget constraint of $4,000 and a non-negotiable completion deadline of May 1, 2017,
otherwise known as Design Day.
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Carvajal, Gerardo. "Reliability of automotive transmission bearings." Thesis, Open University, 2016. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.700484.
Full textAbstract:
The manufacture of rolling element bearings, as high precision mechanical components, has experienced remarkable advances in the last few decades. Some of the key factors for these advances include the incorporation of computer numerical control in machining, improvements in the quality of lubricants and improvements in the cleanliness of the steel. This in turn, has led to the highest ever level of reliability not only of the rolling bearing as a unit but of the whole mechanical assembly where the rolling bearing is destined to work. However, under high performance running conditions, such as in automotive transmissions, intrinsic and/or external factors can hinder the rolling bearings from performing as expected and as a result, premature failure may occur. In this context, the present PhD thesis investigates the premature and recurrent failure of a specific type of roller bearing, identified by its model number as 30206, when used as the tail bearing of a particular automotive rear differential unit. For this, a series of theoretical and practical approaches are used first, to characterise the failure, secondly, to propose failure hypotheses and lastly, to evaluate the hypotheses. From the forensic studies carried out on in-field-used bearings, three failure hypotheses are proposed; in these, the mechanisms of fretting, static overload and corrosion are respectively regarded as precursors to surface-initiated rolling contact fatigue. For the evaluation, 'pre-damaged' bearings, representative of each failure hypothesis, are first generated via various mechanisms and then tested in a bespoke made rolling contact fatigue test rig.
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MacCrimmon, Donald Cody. "Automotive Brake Wear Debris Analysis." OpenSIUC, 2009. https://opensiuc.lib.siu.edu/theses/486.
Full textAbstract:
Passenger vehicle disk brakes produce large amounts of wear debris that needs to be analyzed to verify its environmental and health impact because its effects are amplified by the massive extent of vehicular transportation around the world. An efficient and thorough method for wear debris analysis should be derived from this research to assist brake manufacturers and researchers in understanding the characteristics of wear particulates being released from current brake materials. In addition, a test method allowing inspection of brake formulations in development phase should be provided and several model "environmentally friendly" brake lining materials should be developed. The most hazardous constituents in a known brake lining formula should be replaced with non-hazardous materials that will obtain performance specifications comparable to the original formula. The brake manufacturing industry and general public should be notified of important findings from this research. Model brake linings fabricated on-site with known constituents were run through an AO4D performance dynamometer test to collect airborne and non-airborne wear debris that is comparable to wear debris produced by an average passenger vehicle. Based on previous experience with analysis of brake linings, this wear debris will be analyzed with scanning electron microscopy equipped with energy dispersive X-ray microanalysis (SEM-EDX), transmission electron microscopy with EDX (TEM-EDX), X-ray diffraction (XRD), polarized light microscopy (PLM), X-ray fluorescence (XRF), and laser scattering particle size distribution analyzer (LSPSDA). Research presented in this report indicates clearly that the previous work published by several groups is lacking sufficient information and the findings should be corrected. For instance the particle size distribution detected by particle size analyzers and impactors (recommended by EPA) is not accurate and TEM as well as SEM studies allowing direct observation of wear particles revealed considerable differences between sizes detected by these analyzers and realistic particle size. EDX in combination with XRF and XRD allows for reliable identification of chemical species and crystalline phases present in wear debris. True airborne wear debris should be sampled from brake exhaust from an appropriate distance. Degummed hemp shows promising results as a copper replacement in low-metallic friction material.
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Lenzini, Stefano <1993>. "Automotive Antennas for V2X Communications." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2022. http://amsdottorato.unibo.it/10053/1/tesi_Dottorato_Lenzini.pdf.
Full textAbstract:
The main topic of this thesis is about the design and prototyping of automotive antennas that allows Vehicle to Everything (V2X) communications, that is the communication between the vehicle and all what else is relevant. In particular 5G will be an enabling technology for these communications.
Vehicular connectivity is a mandatory feature in nowadays car. Typical applications are that one related to the infotainment, i.e. radio or mobile telephone, or security ones, i.e. radars. The antennas that support this type of communications can be divided in two frequency range: the sub-6GHz range and the millimeter wave (mmW) range. Also the 5G standard can be divided in this two frequency ranges. In this work different automotive antennas solutions are presented for both the frequency bands.
For the sub-6GHz range two different antennas are presented: a tin sheet 5G-sub6 radiating element and a complete 5G-GNSS-V2X shark fin module. For the mmW frequency band, an automotive PCB planar solution is presented. Since these frequencies are a novelty for the automotive market, satellite communications (SatCom) field has been considered. In SatCom applications mmW solutions are a well-established technology. Thus, also mmW antennas solutions for SatCom applications are here presented.
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Carratù, Marco. "Soft sensors in automotive applications." Doctoral thesis, Universita degli studi di Salerno, 2019. http://elea.unisa.it:8080/xmlui/handle/10556/4241.
Full textAbstract:
2017 - 2018In this work, design and validation techniques of two soft sensors for the estimation of the motorcycle vertical dynamic have been proposed. The aim of this work is to develop soft sensors able to predict the rear and front stroke of a motorcycle suspension. This kind of information are typically used in the control loop of semi‐active or active suspension systems. Replacing the hard sensor with a soft sensor, enable to reduce cost and improve reliability of the system. An analysis of the motorcycle physical model has been carried out to analyze the correlation existing among motorcycle vertical dynamic quantities in order to determine which of them are necessary for the development of a suspension stroke soft sensor. More in details, a first soft sensor for the rear stroke has been developed using a Nonlinear Auto‐Regressive with eXogenous inputs (NARX) neural network. A second soft sensor for the front suspension stroke velocity has been designed using two different techniques based respectively on Digital filtering and NARX neural network. As an example of application, an Instrument Fault Detection (IFD) scheme, based on the rear stroke soft sensor, has been shown. Experimental results have demonstrated the good reliability and promptness of the scheme in detecting different typologies of faults as losing calibration faults, hold‐faults, and open/short circuit faults thanks to the soft sensor developed. Finally, the scheme has been successfully implemented and tested on an ARM microcontroller, to confirm the feasibility of a real‐time implementation on actual processing units used in such context. [edited by Author]
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