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Stertz, Tom. "Needs assessment for development of advanced curriculum in electronic engine management systems." Online version, 1999. http://www.uwstout.edu/lib/thesis/1999/1999stertzt.pdf.
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Tannehill, Dana E. "The use of a low-fidelity computer simulation in teaching the diagnosis of electronic automotive systems /." free to MU campus, to others for purchase, 1998. http://wwwlib.umi.com/cr/mo/fullcit?p9901293.
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Azpeitia, Camacho Marcia E. (Marcia Edna). "Common global architecture applied to automobile electrical distribution systems." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/59222.
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Thesis (S.M. in System Design and Management)--Massachusetts Institute of Technology, Engineering Systems Division, System Design and Management Program, 2010.Cataloged from PDF version of thesis.
Includes bibliographical references (p. 111-112).
Electrical and electronic components have a prominent role in today's vehicles. Particularly during the last two decades, functionality has been added at an exponential rate, resulting in increased complexity, especially of the Electrical Distribution System (EDS), which is the backbone of the Electrical and Electronic System (EES). Increased content and complexity of electrical systems, together with pressure to reduce the design cycle time - to bring a larger variety of products to the market and at a faster pace - are forcing car companies to re-evaluate their existing electrical development processes. One of the ways that car makers have devised to accomplish this is a common EES architecture strategy, which consists in combining communization, standardization, reusability and best practices to create flexible EES architectural concepts that will be used in a higher number of derivative vehicles. This common architecture has several benefits, the most important being: reduction of development costs and time, which translates in less time for putting the products in the market; architecture, concepts and components reuse; rapid platform modifications, to adapt to market changes and regional preferences. The EES architecture choice for a vehicle is the result of the implementation of the desired functions in hardware and software. Many considerations need to be taken into account: costs, network capabilities, modularity, manufacturing, energy management, weight, among several others. The present work aims to explain these considerations, as well as the elements of the common EES, and in particular their impact on the EDS. Another important aspect for the successful implementation of the common architecture is the EDS development process. Despite the availability of a wide range of software tools, the current EDS approach is intensely manual, relying on design experts to define and maintain the interrelationships and complexities of the core design definition. There is a need to redefine the process, from concept to manufacture using a systems engineering approach, which would yield key benefits, like shorten development time, produce accurate harness manufacturing prints, reduce wiring costs by synchronizing all input and output data. An analysis of the tools and methods for design and validation of wire harnesses will be presented in the last two chapters of this thesis.
by Marcia E. Azpeitia Camacho.
S.M.in System Design and Management
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Jiménez, Hernández Angel Mário. "Design for manufacturing systems from automotive industry perspective." To access this resource online via ProQuest Dissertations and Theses @ UTEP, 2007. http://0-proquest.umi.com.lib.utep.edu/login?COPT=REJTPTU0YmImSU5UPTAmVkVSPTI=&clientId=2515.
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North, Thomas B. "Liquid Nitrogen Propulsion Systems for Automotive Applications: Calculation of Mechanical Efficiency of a Dual, Double-acting Piston Propulsion System." Thesis, University of North Texas, 2008. https://digital.library.unt.edu/ark:/67531/metadc6070/.
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A dual, double-acting propulsion system is analyzed to determine how efficiently it can convert the potential energy available from liquid nitrogen into useful work. The two double-acting pistons (high- and low-pressure) were analyzed by using a Matlab-Simulink computer simulation to determine their respective mechanical efficiencies. The flow circuit for the entire system was analyzed by using flow circuit analysis software to determine pressure losses throughout the system at the required mass flow rates. The results of the piston simulation indicate that the two pistons analyzed are very efficient at transferring energy into useful work. The flow circuit analysis shows that the system can adequately maintain the mass flow rate requirements of the pistons but also identifies components that have a significant impact on the performance of the system. The results of the analysis indicate that the nitrogen propulsion system meets the intended goals of its designers.
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Rivas, Caicedo Maria Adelina. "Modélisation et contrôle du moteur à allumage commandé pour Euro 6." Thesis, Grenoble, 2012. http://www.theses.fr/2012GRENT066/document.
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Cette thèse a été développé grâce à une Conventions Industrielles de Formation par la Recherche (CIFRE). Cette convention fait partie d’un programme de l’Association nationale de la recherche et de la technologie (ANRT), coordonné par le Centre nationale de la recherche scientifique (CNRS). L’accord CIFRE subventionne les entreprises françaises qui engagent un thésard pour conduire un projet scientifique dans l’entreprise, en partenariat avec un laboratoire publique de recherche. Pour cette thèse, l’accord CIFRE a été signé par Renault et les laboratoires GIPSA Lab de Grenoble et PRISME d’Orléans.Cette thèse se focalise sur la modélisation 0D, en particulier sur une description plus détaillé du processus de la combustion et l’estimation des masses enfermées dans la chambre de combustion d’un moteur à allumage commandé (Spark Ignited (SI) engine). Les principaux développements comportent des points suivants :- L’impact flamme parois pendant la combustion : un nouveau modèle pour prendre en compte ce phénomène dans le cadre d’un modèle de combustion 0D à deux zones a été développé. Ce modèle permet de prendre en compte la géométrie de la chambre de combustion et la proportion de flamme que brûle proche des parois du cylindre. Plusieurs études ont montré qu’une grand proportion (20% au 30%) du mélange frais brûle dans ce mode de combustion ce qui montre l’importance de prendre en compte ce phénomène. - L’estimation de la mass totale enfermée dans la chambre de combustion après la fermeture des soupapes est un phénomène très intéressant qui présente un Challenger pour les chercheurs motoristes. Une estimation plus précise de la mass enfermée dans la chambre de combustion permet d’avoir un meilleur contrôle de l’injection du carburant et une amélioration dans le traitement des polluants.- Le dernier point à traiter dans cette thèse est la commande d’un système d’injection “common rail”. Ce point a pour but de compléter la modélisation de la combustion en ajoutant une thématique liée à l’injection, lequel est un paramètre crucial dans le processus de la combustion. L’objectif d’un système d’injection common rail est de contrôler l’avance de l’injection, la durée et la pression, de façon indépendante dans chaque cylindre, pour avoir un meilleur contrôle de la combustion, en dépendant des conditions d’opération. Cette injection permet de réguler le carburant en quantités très petites, ce qu’aide à réduire la consommation, les émissions polluantes, et aussi à améliorer la performance du moteurThis thesis has been developed thanks to a Conventions Industrielles de Formation par la Recherche (CIFRE)1 agreement, that is a program of the french agency Association nationale de la recherche et de la Technologie(ANRT), coordinated by the Centre nationale de la recherche scientifique (CNRS). The CIFRE program grants the Franch companies who engage a PhD student to carry out a research project of the company within a public research lab. For this thesis, a CIFRE agreement has been accorded between the automobile company Renault France and the scientific laboratories Gipsa Lab in Grenoble and PRISME in Orléans.This thesis is focused on the modeling of a detailed description of the 0D combustion process and the estimation of the enclosed mass in the combustion chamber for a Spark Ignited (SI) engine. The main developments are summarized as follows:- The combustion process is frequently modeled as growing flame inside of the combustion chamber. Many 0D thermodynamical Engine models mostly focus on the laminar characteristics of such a free developing ame, but they lack of a suitable approximation of the combustion when the ame reaches the cylinder walls. In this thesis, a flame-wall interaction model is proposed as a complement of a 0D two zones thermodynamical model.- The estimation of the total mass enclosed in the combustion chamber is an interesting and challenging task for the engine control community. In this thesis, two nonlinear observers are synthesized for the enclosed mass estimation: a classical nonlinear high gain observer and an extended linear parameter varying (LPV) high gain observer.- A controller for a common rail injection system is developed in this thesis. First, an input state linearization of a common rail model is performed, in order to overcome the strong nonlinearities and build a virtual linear model. Using the virtual model, two linear control strategies are implemented to regulate the common rail pressure: an optimal linear quadratic regulator LQR with integral action and an optimal LQR tracking (feedforward) with integral action strategy
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Mofid, Kam. "Flexible assembly systems, a case study in the automobile industry." Thesis, Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/24363.
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Ekman, Rasmus. "Automobile Control Systems : Transition from Controller Area Networks to Ethernets." Thesis, KTH, Radio Systems Laboratory (RS Lab), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-148052.
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Due to concerns about the negative impacts of powering vehicles using fossil fuel and the future availability of fossil fuel, there has been an increased focus on electric vehicles. However, current electric vehicle energy efficiency is a key problem as these vehicles are not as efficient as fossil-fueled vehicles. One way of decreasing a vehicle’s energy consumption is to reduce the weight of the vehicle, while still ensuring the safety and reliability of the vehicle. Controller Area Network (CAN) systems have been used in vehicles to realize real-time applications, however the low peak data rates of CAN have begun to limit the applications that can be realized. This bachelor’s thesis project focuses on secure communication within a vehicle using Ethernet. Additionally, the use of Power over Ethernet can be used for powering some of the network attached devices within the vehicle. The goal is to reduce the number of components and the weight of the vehicle while continuing to ensure the security and reliability of the communication – even when the network grows in size (either in physical size or in number of connected devices). This thesis shows that an Ethernet based system can serve as a possible replacement candidate for the CAN system due to its low latencies and high bandwidth. Ethernet is also a very scalable system with none of the limitations that a CAN system have.Den negativa påverkan av fossila bränslen har de senaste årtionden haft en negativ på planeten, mängden fossila bränslen över världen konsumeras även i en högre takt än vad som produceras. Därför har fokusen för att finna förnybara energi källor som både är effektiva och inte påverkar miljön på ett negativt sätt ökat. Därför är elbilar en viktig del i konverteringen av enheter som drivs av fossila bränslen till förnybara energikällor. Ett av problemen i en elbil är att energi konsumptionen är inte lika effektiv som fossila bränslen inom bil industrin. Ett sätt att sänka energi konsumptionen är att minska mängden komponenter inom en bil för att minska på vikten, utan att påverka säkerheten och tillförlitligheten. Tidigare har man använt sig av ett CAN system för att försäkra sig om systemet fungerar felfritt i realtid, problematiken med detta system är att när nätverket ökar i storlek så sätter de fysiska begränsningarna av detta system stop för den garanterade säkerheten. Detta kandidatexamensarbete kommer att fokusera på den interna kommunikationen i en elbil med hjälp av ett ethernet baserat kommunkations system över CAN systemet. Power over Ethernet tekinken kommer att tillämpas för de systemen som kan drivas av detta system. Målet är att reducera antalet komponenter som behövs och att garantera säkerheten och tillförlitligheten av den interna kommunikationen när nätverket av komponenter ökar i storlek. Det här kandidatarbetet visar att Ethernet kan ersätta det nuvarande CAN systemet ef-tersom att Ethernet erbjuder låga latenser och hög bandbredd. Detta arbete visar även att Et-hernet är väldigt skalbart och har inte begränsingarna som ett CAN system har.
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Ho, Angela Wei Ling. "Integrating automobile multiple intelligent warning systems : performance and policy implications." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/38571.
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Thesis (S.M.)--Massachusetts Institute of Technology, Engineering Systems Division, Technology and Policy Program, 2006.Includes bibliographical references (p. 160-167).
Intelligent driver warning systems can be found in many high-end vehicles on the road today, which will likely rapidly increase as they become standard equipment. However, introducing multiple warning systems into vehicles could potentially add to the complexity of the driving task, and there are many critical human factors issues that should be considered, such as how the interaction between alarm alerting schemes, system reliabilities, and distractions combine to affect driving performance and situation awareness. In addition, there are also questions with respect to whether there should be any minimum safety standards set to ensure both functional and usage safety of these systems, and what these standards should be. An experiment was conducted to study how a single master alert versus multiple individual alerts of different reliabilities affected drivers' responses to different imminent collision situations while distracted. A master alert may have advantages since it reduces the total number of alerts, which could be advantageous especially with the proliferation of intelligent warning systems. However, a master alert may also confuse drivers, since it does not warn of a specific hazard, unlike a specific alert for each warning systems.
(cont.) Auditory alerts were used to warn of imminent frontal and rear collisions, as well as unintentional left and right lane departures. Low and high warning reliabilities were also tested. The different warning systems and reliability factors produced significantly different reaction times and response accuracies. The warning systems with low reliability caused accuracy rates to fall more than 40% across the four warning systems. In addition, low reliability systems also induced negative emotions in participants. Thus, reliability is one of the most crucial determinants of driving performance and the safety outcome, and it is imperative that warning systems are reliable. For the master versus distinct alarms factor, drivers responded statistically no different to the various collision warnings for both reaction times and accuracy of responses. However, in a subjective post-experiment assessment, participants preferred distinct alarms for different driver warning systems, even though their objective performance showed no difference to the different alerting schemes. This study showed that it was essential to design robust and reliable intelligent warning systems. However, there are no existing safety standards today to ensure that these systems are safe before they are introduced into vehicles, even though such systems are already available in high-end cars.
(cont.) Even though there are tradeoffs in having standards, such as increased time-to-market and possible loss of innovation, I recommend that safety standards be set nonetheless, since standards will ensure the safety performance of warning systems, to an extent. In terms of functional safety, safety standards should be performance-based, and should specify a minimum level of reliability. In terms of usage safety, the standards should also be performance-based, where driving performance can be indicated by measures such as reaction time, lane position, heading distance and accuracy of responses. In addition, multiple threat scenarios should also be tested. In terms of design guidelines, the various human factors guidelines from different countries should be harmonized internationally to ensure that manufacturers have access to a consistent set of guidelines. Finally, it is also important that these standards, especially for usage safety, specify tests with not just the average driver, but also with peripheral driving populations including novice and elderly drivers.
by Angela Wei Ling Ho.
S.M.
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Berry, Thomas Davis. "Experimental analysis of specific auditory-light safety belt reminder systems and safety belt behavior: "prods" or "prompts"." Thesis, Virginia Tech, 1988. http://hdl.handle.net/10919/43833.
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Safety belt reminder systems are ubiquitously present in most, if not alI automobiles sold in the United
States. Past research has found that the effectiveness of these reminder systems have shown minimal social benefit in the effort to increase safety belt use. The current investigation was conducted to determine if modified reminder systems could improve safety belt use. This research used an electronically equipped research vehicle sponsored by General Motors Corporation. The vehicle's research equipment allowed for the manipulation of different auditory reminder stimuli (i.e., chime, buzzer, and voice), temporal factors (e.g., presentation delays and second reminders) I and the measurement of the driver's safety belt use. Three modifications were explored: the presentation of a Delayed Reminder, Second Reminder, and comparisons of different auditory stimuli. The vehicle
also permitted a single subject repeated measure design and methodology that provided process analysis.
The results showed that the Delayed Reminder appeared ineffective at increasing belt use, whereas the Second Reminder was found to increase two out of nine subjects' safety belt response rates. The differential effects between the three auditory stimuli (i.e., Chime, Buzzer, & Voice) were inconclusive, though for two subjects the Buzzer and Voice were associated with safety belt increases.Master of Science
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Boyle, Linda T. Ng. "Statistical analyses of traffic advisory systems on driving behavior /." Thesis, Connect to this title online; UW restricted, 1998. http://hdl.handle.net/1773/10174.
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Rose, James Cooper. "An expert system model of commercial automobile insurance underwriting." The Ohio State University, 1986. http://rave.ohiolink.edu/etdc/view?acc_num=osu1273149457.
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Darkwa, K. "Thermal energy storage (TES) systems involving thermochemical reactions." Thesis, Cranfield University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309836.
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Konz, Martin. "A generic simulation of energy consumption of automobile air conditioning systems." Thesis, Port Elizabeth Technikon, 2003. http://hdl.handle.net/10948/129.
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The air conditioning system in a car is, in addition to the heating system, installed to increase the comfort in the passenger compartment. Comfort is not the only reason for automotive air conditioning systems, as road safety also improves with the comfort of the driver, as a pleasant environment reduces driver fatigue. The rising environmental problems and, hence, resulting stringent legislation are forcing the automobile industry to develop cars with ever decreasing fuel consumptions. The question of better fuel consumption and energy utilisation does not stop with the engine and aerodynamics, but is required of the air-conditioning system as well. Thus, incessantly innovative technologies are developed to decrease the energy required by the air-conditioning systems. The interaction of the refrigerant cycle components and the rapidly changing operating conditions of the car (speed, revolutions per minute, etc.) places extensive demands on the control system. In addition, the air-conditioning system is also designed for high ambient temperatures (cool down), but is mostly used in fairly moderate conditions. This operation allows for energy saving control strategies such as externally controlled compressors, blower motor control, etc. The experimental comparison of different air-conditioning systems, components or control strategies is very time consuming and extensive, and the use of an air-conditioned wind tunnel is inevitable when experiments need to be done with reproducible ambient conditions.This, combined with the high costs of installation and operation of a wind tunnel is a major problem. Furthermore, the effect of component or control strategy enhancements should be available as soon as possible in the early stages of design. The above considerations have prompted the rapid development of new powerful simulation tools, but in most cases the simulation tools are focused on one specific component or problem only. A more holistic approach would be to combine the calculations of two or more programs. This implies the adaptation of the model to more programs which leads to a lack of transparency. Obviously, the entire development work cannot be done entirely by simulation, especially in the later phases of the development where it would still be necessary to build prototypes to evaluate the done work experimentally. However, in the early stages of development, it would be advantagous to work without expensive prototypes.
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Kandade, Rajan Vasudev [Verfasser]. "Speech Enhancement in Hands-free Systems for Automobile Environments / Vasudev Kandade Rajan." Aachen : Shaker, 2017. http://d-nb.info/1138176745/34.
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Kim, Chiwon 1978. "Comparison and optimization of control policies in automobile manufacturing systems by simulation." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/16673.
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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2004.Includes bibliographical references (p. 109-110).
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
This thesis studies material flow control policies for automobile manufacturing systems. Various control policies are implemented in simulations of manufacturing systems to test whether they increase the efficiencies of the systems in terms of specific performance measures of interest. Among the control policies, Control Point Policy (CPP) is deeply studied, because this policy is designed for controlling complex manufacturing system with multiple product types. First, fundamental research in CPP is presented to understand the effects of the parameters on single product type manufacturing systems. Then, multiple product type, assembly-disassembly systems are studied with various control policies, including hybrid policies. Finally, a real automobile manufacturing system case study is presented, and various control policies are experimented on in the simulation model. Because the evaluations of performances are done by simulations, the speed of simulation becomes a very important problem. This thesis therefore presents a new approach to accelerating the speed of simulation.
by Chiwon Kim.
S.M.
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Kragha, Oghenerume Christopher. "Economic implications of natural gas vehicle technology in U.S. private automobile transportation." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/59686.
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Thesis (S.M. in Technology and Policy)--Massachusetts Institute of Technology, Engineering Systems Division, Technology and Policy Program, 2010.Cataloged from PDF version of thesis.
Includes bibliographical references (p. 70-75).
Transportation represents almost 28 percent of the United States' energy demand. Approximately 95 percent of U.S. transportation utilizes petroleum, the majority of which is imported. With significant domestic conventional gas resources, optimistic projections of unconventional natural gas resources, and the growing international liquefied natural gas (LNG) market, gas prices are expected to remain lower than oil. While natural gas currently provides approximately 24 percent of the United States' energy consumption, there has been no significant growth in the natural gas vehicle market in the past fifteen years. Natural gas has comparative environmental advantages to gasoline and diesel, with lower CO2 emissions per mega joule of fuel consumption. A natural gas powered vehicle fleet could reduce the country's fuel costs, dependence on imported fuel, and greenhouse gas emissions. To fully comprehend the future role of natural gas vehicles in the United States, all the major technological and market forces affecting the successful deployment of this vehicle technology must be analyzed interdependently under market and energy policy-regulated scenarios. I investigate the potential role of natural gas in transportation using a computable general equilibrium (CGE) model of the global economy that is resolved for the US and other major countries and regions. To do so, I add a dedicated compressed natural gas (CNG) vehicle option to the Emissions Prediction and Policy Analysis (EPPA) Model as an option to the conventional internal combustion engine (ICE) vehicle. The model projects changing prices of fuel and other goods over time, given specification of resource availabilities. With the CNG vehicle specification I am able to evaluate the effect of the CNG option on transportation emissions, oil imports, natural gas use, and other economic indicators. I consider different policy scenarios for the future, including the adoption of a targeted emissions cap policy to see how that affects the competitiveness of CNG vehicles. Several conclusions about the potential role of nature gas vehicles in the United States are drawn from this analysis. First, NG vehicles will reduce household transportation emissions in proportion to their share of the vehicle fleet. Second, stringent emissions policies will stimulate the penetration of natural gas vehicles, but high vehicle costs and infrastructure may hinder their deployment. There is a correlation between increased NG vehicle use and the reduction of oil imports. In the long term, development of cleaner alternative fuels with similar infrastructure to gasoline may hamper CNG vehicle growth.
by Oghenerume Christopher Kragha.
S.M.in Technology and Policy
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Wiemeler, Dirk. "Aero acoustic on automotive exhaust systems." Thesis, Lyon, INSA, 2013. http://www.theses.fr/2013ISAL0018.
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Dans les systèmes d'échappement automobile, les sources de bruit d'origine aéro-acoustique représentent une partie importante du contenu fréquentiel, objectivement et subjectivement identifiable. De robustes procédures de tests ont été mises en place mais la simulation du contenu du bruit n'a pas encore fait ses preuves dans les processus de développement au quotidien. Cette thèse montre que le bruit aéro-acoustique provenant de sources type dipôle est dominant pour ce qui concerne les systèmes automobiles. La simulation des écoulements à l'origine de ces bruits spécifiques combinée avec les outils de calculs acoustiques classiques est très lourde voir tout simplement impossible. Le but de cette thèse est d'analyser la loi d'échelle pour des modèles de sources compactes, permettant de déterminer l'émission de la puissance acoustique selon différentes configurations géométriques "simples" et généralement répandues (par ex. tube perforé, diaphragme placé dans un tube…) basées sur des données empiriques. Il est démontré à l'aide de simulations que son utilisation est simple et que la précision de ces modèles de sources est satisfaisante si l'on ne s'écarte pas trop des géométries déjà analyséesOn automotive exhaust systems aero acoustic noise is a dominant and critical noise content, which is clearly objectively and subjectively detectable. Robust test procedures are established but the simulation of this noise content has not gained ground in the real life development processes. This thesis shows that the dominating characteristic of the aero acoustic noise of automotive systems is dipole noise. The simulation of these specific noise sources with classical computational areo acoustics is very cumbersome or even just impossible. The aim of the thesis is a review of the scaling law approach for compact source models, enabling the determination of the sound power emission of discret configurations based on empirical data. Application simulations show that the use of these source models is simple and that the accuracy is acceptable within the geometry limits analysed
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Shaw, David. "Development of a model for smart card based access control in multi-user, multi-resource, multi-level access systems." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 1999. https://ro.ecu.edu.au/theses/1229.
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The primary focus of this research is an examination of the issues involved in the granting of access in an environment characterised by multiple users, multiple resources and multiple levels of access permission. Increasing levels of complexity in automotive systems provides opportunities for improving the integration and efficiency of the services provided to the operator. The vehicle lease / hire environment provided a basis for evaluating conditional access to distributed, mobile assets where the principal medium for operating in this environment is the Smart Card. The application of Smart Cards to existing vehicle management systems requires control of access to motor vehicles, control of vehicle operating parameters and secure storage of operating information. The issues addressed include examination of the characteristics of the operating environment, development of a model and design, simulation and evaluation of a multiple application Smart Card. The functions provided by the card include identification and authentication, secure hash and encryption functions which may be applied, in general, to a wide range of access problems. Evaluation of the algorithms implemented indicate that the Smart Card design may be provably secure under single use conditions and conditionally secure under multiple use conditions. The simulation of the card design provided data to support further research and shows the design is practical and able to be implemented on current Smart Card types.
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Chen, Chialin. "Prospects fro automobile recycling, an integrated approach of systems dynamics and life-cycle assessment." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/35426.
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Wennerholm, Karl, and Peter Rosengren. "Design of a vibro-tactile warning system in an automobile application." Thesis, Linköping University, Department of Management and Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-11824.
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In-vehicle warning systems are today mainly using the visual and auditory channels for presentation. As cars get more and more sophisticated the demand on new ways of presenting information increases. This report investigates if the sense of touch, in form of a vibro-tactile seat is a prospective channel for warning information. To achieve the objectives the tactile seat was developed, implemented and tested in a simulator environment. The final result is a complete tactile seat with a set of warnings which correspond with different critical situations.
The tactile seat made it possible to conduct a simulator-based experiment including comparison with a visual head-up warning presentation. The experiment proved significant difference in discovery distance in the comparison between the no system and the tactile warning system.
The overall conclusion is that a vibro-tactile warning display in the driver’s seat is an excellent way of presenting certain warning information. The tactile channel is especially favorable when fast reaction time is essential. Further work could include designing and testing a combined tactile and visual system.
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Joy, Tony. "A Robust QFT Control Approach for Automobile Engine Idle Speed Systems: Modeling, Design and Simulation." Case Western Reserve University School of Graduate Studies / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=case1464794127.
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Athavale, Jayati Deepak. "Evaluation of Internal Fin Geometry for Heat Transfer Enhancement in Automobile Exhaust Energy Harvesting Systems." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/54017.
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Thermoelectric generators (TEGs) are currently being explored for their potential in harvesting energy from automobile exhaust. TEGs in form of an appropriate TEG- Heat exchanger module can utilize the temperature difference between the hot exhaust gases and the automobile coolant and convert it into electrical voltage. The amount of power is anticipated to be a few hundred watts depending on the temperature gradient and the material of the TEGs.
The focus of this study is increasing the hot side heat transfer for improved performance of the thermoelectric generators using two different internal fins — louvered fins and herringbone wavy fins. The multi-louvered fins basically have 'multi flat plate' behavior and will enhance the heat transfer by deflecting the air from its original path and aligning it with the plane of the louvers. Herringbone fins are used to lengthen the path of airflow allowing for greater residence time and better mixing of the flow. They also provide for greater wetted surface area achieving higher heat transfer. The flow and heat transfer behavior inside the exhaust pipe test section with internal fins is modeled using commercial numerical software.
The thermal and flow behavior through both these internal fins depends to a large extent on geometric parameters and fin arrangement. Optimization of the fin design is considered to determine the configuration that provides highest heat transfer while providing least pressure drop across the pipe length. The heat transfer and pressure drop characteristics are compared to the baseline flow without any fin enhancement.Master of Science
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Surabhi, Suman Reddy. "Traffic responsive signal systems to address rain-related congestion." Birmingham, Ala. : University of Alabama at Birmingham, 2008. https://www.mhsl.uab.edu/dt/2008m/surabhi.pdf.
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Abdel-Jaber, Fadi Fayez. "Design and implementation of car rental system." CSUSB ScholarWorks, 2001. https://scholarworks.lib.csusb.edu/etd-project/1836.
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When someone wants to rent a car, the customer will usually think twice about the company from which they want to rent. The decision will be based on factors such as good rates, quality and customer service. The service the company representative offers the client should be fast, clear and accurate. This goal cannot be achieved without an informative system that will enable the customer representative to answer the various questions the client might have.
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de, Oliveira Marcelo Gurgel. "An integrated methodology for the evaluation of the safety impacts of in-vehicle driver warning technologies." Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/19162.
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Kalakota, Govardhan Reddy. "Hierarchical Partition Based Design Approach for Security of CAN Bus Based Automobile Embedded System." University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1535382487070314.
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Katcoff, Elizabeth. "From plant to dealer : improving route optimization for outbound vehicle distribution at an automobile manufacturer." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/77476.
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Thesis (M.B.A.)--Massachusetts Institute of Technology, Sloan School of Management; and, (S.M.)--Massachusetts Institute of Technology, Engineering Systems Division; in conjunction with the Leaders for Global Operations Program at MIT, September 2012.Cataloged from PDF version of thesis.
Includes bibliographical references (p. 78-79).
With rising fuel costs and increasing rates among specialized shipping carriers, cost mitigation in outbound distribution is increasingly important for automobile manufacturers. Many manufacturers have turned to specialized, licensed supply chain software to optimize their distribution network to determine the appropriate path for each product from factory to dealer. While these software programs include robust algorithms for optimizing the network, they are only as strong as the user inputs. To gain maximum value from supply chain software, automotive companies must fully understand the structure of their networks, their costs, and their constraints to ensure that the model is all-inclusive. This paper attempts to understand the distribution model used at Nissan North America by formulating the model algebraically with a linear program. With insights to the model design, we uncover several opportunities for improvement. Specifically, we create a more inclusive objective function by ensuring that all relevant costs are captured so that the model optimizes the "total landed cost." We also highlight several opportunities for increased model flexibility in areas where the model is over constrained -- both in its mathematical constraints and in its structural design. With increased flexibility, supply chain software has more alternative paths in the network to choose from, increasing the opportunity for the program to find a lower cost solution. Lastly, we stress the importance of using the software for scenario analysis to create a more responsive supply chain. When implemented, the improvements presented in this paper yield a cost savings of over $10 million. The principles of the model improvements in this thesis can be applied to distribution optimization in any industry.
by Elizabeth Katcoff.
S.M.
M.B.A.
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Kirchain, Randolph E. (Randolph Edward) 1971. "Modeling methods for complex manufacturing systems : studying the effects of materials substitution on the automobile recycling infrastructure." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/9692.
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Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1999.Includes bibliographical references (p. 237-241).
Classically, technical cost models have been constructed using commercial spreadsheet problems. Spreadsheets, however, are not well suited to construct models of industrial systems, especially those where variable configurations of operation steps arc of interest. In light of this, a methodological framework and complementary computer tool were developed to address the existing impediments to system modelinb. This tool parametrizes the components of a system model and of spreadsheet based TCMs. Here, parametrization means creating both data structures which describe each system part and procedures which emulate the behavior and interrelationship of those parts. Using this strategy, a tool was created which successfully permits definition and manipulation of any real configuration, ensures consistent application of model formulae, provides a mechanism for appropriate and conveniently audited linking of variable values, and affords extensive auditing. This modeling tool was applied against a real-world case study of the automobile recycling infrastructure. For this system, concerns exist regarding how it will sustain as vehicles continue to decline in mass and change in composition. To reveal this, a process-based cost model of the automobile recycling system was created and used to I) expose retiring fleet compositions which pose a problem for recyclers and 2) evaluate strategies for using the system's waste, automobile shredder residue (ASR). The system model was run against retired fleets made up of three vehicles: predominantly steel, aluminum intensive, and polymer composite intensive (CIV). Results indicated that the current recycling system maintains profitability except when presented with a 100% CIV fleet. Also, the material value within a vehicle containing an aluminum structure, closures, chassis, and engine block would be sufficient to prompt extensive dismantling, consuming the bulk of the shredder's feedstock. For a similar vehicle without the aluminum chassis, shredders would have to offer 18¢/kg. for hulks, to preserve their profitability. Of the ASR processing technologies investigated, pyrolysis seems the most promising. Pyrolysis achieves profitability at a landfill price of $50/ton. In contrast, mechanical separation and selective precipitation require landfill prices of $70/ton.
by Randolph E. Kirchain Jr.
Ph.D.
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Shields, William. "Theory and Practice in the Study of Technological Systems." Diss., Virginia Tech, 2007. http://hdl.handle.net/10919/26796.
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This dissertation is intended to further technology studies by analyzing some of its important methodological tools and using those tools in combination to study complex technological systems in an historical context. The first chapter of the dissertation examines in detail four influential models by which complex technological systems have been analyzed: Hughesâ s system model, Bijkerâ s social construction model, Latour, Callon, and Lawâ s actor-network model, and Ruth Schwartz Cowanâ s consumption junction model. For each model, I summarize the seminal works, analyze the uses of the model in the literature, and offer some refinements to the models based on that analysis. Chapter 2 presents three case studies applying these models two different technological systems. First, the early development of the American automobile industry, 1895 to 1940, is studied using Hughesâ s concepts of technological momentum and reverse salients. Second, the automobileâ s impact on American society is explored over the same time period relying on Ruth Schwartz Cowanâ s consumer-oriented perspective and Wiebe Bijkerâ s concept of technological frames. The third case study examines the technological means by which, over a long period of time, American cities were rendered impervious to huge conflagrationsâ commonplace until the end of the 19th century. For the analysis of this system, I use actor-network theory, Wiebe Bijkerâ s technological frames, and Hughesâ s reverse salients.Ph. D.
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Frede, Stefan. "The possibility of a flexible wireless 3-D measurement in the modern automobile production." Thesis, Nelson Mandela Metropolitan University, 2010. http://hdl.handle.net/10948/1203.
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The quality control of geometrical coherences and relations in modern automobile production is done by different stationary and flexible measurement systems and strategies. Furthermore, there currently exists possibilities of inline measurements and offline measurements. This project presents the basic research concerning the possibility of a flexible wireless measurement system in modern automobile production, that is able to combine the advantages of both strategies. An investigation of existing measurement techniques was done in order to find a sensor technology, which enables the wireless measurement process. The research project introduces the current location systems and positioning systems. These techniques are compared by a value benefit analysis to expose a suited technology as basis for the measurement system. As result of the value benefit anlysis, the ultrasonic technique was selected for further investigations. The ultrasonic test setup is used to analyze the accuracy of modern sensors and to verify the possibility of a project related integration. The tests are done in different conditions, in order to compare the laboratory application and the industrial application. During the test measurements different physical influencing variables and disturbances occurred. From this research project, it can be concluded that the laboratory application of the system is possible. However, the industrial application is subject to restrictions.
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Chen, Yan. "Spatial Analysis of Fatal Automobile Crashes in Nashville, TN, 2001-2011." TopSCHOLAR®, 2013. http://digitalcommons.wku.edu/theses/1300.
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With increasing levels of motor vehicle ownership, automobile crashes have become a serious public issue in the U.S. and around the world. Knowing when, where, and how traffic accidents happen is critical in order to ensure road safety and to plan for adequate road infrastructure. There is a rich body of literature pertaining to time-related fatal crashes, most of which focuses on non-spatial factors such as a driver’s visibility at night, drinking and drug use, and road conditions. These studies provide a theoretical basis for understanding the causes of crashes from a non-spatial perspective, and a number of traffic laws and policies consequently have been enacted to minimize the impacts of non-spatial factors. Over the past few years, advances in Geographic Information Systems (GIS) have greatly enhanced our ability to analyze traffic accidents from a spatial perspective. This study aims to fill a void in traffic safety studies by comparing and analyzing the differences in the spatial distribution of fatal crashes based on temporal factors, specifically in three periods: 1) day and night; 2) A.M. rush hours and P.M. rush hours; and 3) weekdays and weekends. With the Nashville Metropolitan Area as the study area, the research utilized a number of spatial point-pattern analysis (SPPA) methods, including planar KDE, planar global auto K function, network global cross K functions, and network local cross K functions. All fatal crashes in the Nashville area were found to be clustered and generally follow the patterns of average daily traffic flow. All time-based subtypes of fatal crashes also were found to be concentrated within the central urban area of Nashville, mostly along major roads, and especially near major road intersections and highway interchanges. No notable spatial differences were detected among the subtypes of fatal crashes when applying network global cross K function. However, with the help of the network local cross K function, some localized spatial differences were identified. Some specific locations of hotspots of nighttime and P.M. rush hour fatal crashes were found not to be at the same locations as those at of daytime and A.M. rush hour fatal crashes, respectively. The approach adopted in this study not only provides a new way to analyze spatial distribution of spatial point events such as fatal crashes, but it also can be applied readily to real-world applications. A good understanding of where these spatial differences are should help various agencies practice effective measures and policies in order to improve road conditions, reduce traffic accidents, and ensure road safety.
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Cotard, Sylvain. "Contribution à la robustesse des systèmes temps réel embarqués multicœur automobile." Phd thesis, Université de Nantes, 2013. http://tel.archives-ouvertes.fr/tel-00936548.
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Les besoins en ressources CPU dans l'automobile sont en constante augmentation. Le standard de développement logiciel AUTOSAR (AUTomotive Open System ARchitecture) - développé au sein d'un consortium regroupant des fabricants de véhicules et des sous-traitants - offre désormais la possibilité de s'orienter vers de nouvelles architectures : les microcontrôleurs multicœur. Leur introduction au sein des systèmes embarqués critiques apporte un lot de problèmes allant à l'encontre des objectifs de sûreté de fonctionnement ISO 26262. Par exemple, le parallélisme des cœurs impose de maîtriser l'ordonnancement pour respecter les contraintes de dépendance entre les tâches, et le partage des données intercœur doit être effectué en assurant leur cohérence. Notre approche s'articule en deux volets. Pour vérifier les contraintes de dépendance entre les tâches, les exigences sur les flots de données sont utilisées pour synthétiser des moniteurs à l'aide de l'outil Enforcer. Un service de vérification en ligne utilise ces moniteurs (injectés dans le noyau du système d'exploitation) pour vérifier le comportement du système. Enfin, pour maîtriser le partage des données intercœur, nous proposons une alternative aux protocoles bloquants. Le protocole wait-free STM-HRT (Software Transactional Memory for Hard Real-Time systems), est conçu sur les principes des mémoires transactionnelles afin d'améliorer la robustesse des systèmes.
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Govender, Shawn Prakash. "Achieving successful implementation of lean manufacturing control systems, to achieve world class status, at Ford Motor Componay of Southern Africa." Thesis, Port Elizabeth Technikon, 2002. http://hdl.handle.net/10948/75.
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Ford Motor Company embarked on a new engine programme, called the Rocam Engine Programme, in the year 2001. This engine was developed specifically for the European market. The customer demand rate was small initially, but ramped up slowly over time. During the low production volume period, this engine was introduced into the local market to test the publics’ response. The response was overwhelmingly positive. The local market grew considerably in a short space of time. During the same time-period, the European customer demand increased, unexpectedly, by approximately 60 percent. The additional production volume placed an enormous amount of pressure on the Engine Plant facility. Two of the production lines in particular, were taking huge strain. These lines were not producing the demand quantities, and the product quality levels were dropping quickly. The research project is based purely on the lean manufacturing principles and philosophies. The aim of the study is to identify the deficiencies on these two production lines, thereby allowing corrective action to be taken. The research methodology comprised of the following steps: · A literature study was performed to give the reader a better understanding of the principles and philosophies of lean manufacturing. · A second literature study was also performed to get a better understanding of the continuous improvement philosophies of lean manufacturing. · A current state map, which depicts the existing situation on the line, was developed for both production lines. The existing situation was then compared to the fundamental principles and philosophies of a lean manufacturer. In this way the deficiencies were highlighted to management. Several recommendations were made regarding the data obtained in the study. The key ones are as follows: · First-line management needs to be trained and coached into managing their business by using quality, cost and delivery as the key performance metrics. They also have to be trained in team dynamics. This will promote cross-functional brainstorming and problem solving sessions. · The accurate collection and processing of base-measurement data should be treated as cardinal, and road shows by production personnel should be presented every week to top management. This will ensure that data is regularly collected and corrective action is continually taken to improve the current situation. Operating personnel needs to be trained in this discipline. Management needs to be serious about implementing lean production principles by enforcing these road shows. · The objectives of Kaizen, production management and the supporting departments (including maintenance and MP&L) ought to be the same in the interest of maximum productivity i.e. leaning towards world class. · First-line management must develop formal structured plans that will rectify the current on-line situation. Plans must include medium to longterm objective setting. Senior management need to coach the first-line management in this discipline. · Few production systems can be implemented without the necessary infrastructure conducive to supporting it. An infrastructure where production gets involved and takes ownership (policy deployment with regards to lines of communication and responsibility between Area Managers, Production Coordinators, Team Leaders and contractors) is what is required. Lean manufacturing deficiencies on the two production lines have been identified. A detailed implementation plan, which needs to be developed by the Ford Production System department, needs to be given to management. This plan needs to address the identified deficiencies in a timely manner that will assist in the Engine Plant meeting their production targets.
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Zhang, Duoxing Evans John L. "Real options evaluation of financial investment in flexible manufacturing systems in the automotive industry." Auburn, Ala, 2008. http://repo.lib.auburn.edu/EtdRoot/2008/SPRING/Industrial_and_Systems_Engineering/Dissertation/Zhang_Duoxing_20.pdf.
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Korn, Dennis Raymond. "The development of a student-initiated, teacher-guided hypermedia program for automotive computer control systems." CSUSB ScholarWorks, 1997. https://scholarworks.lib.csusb.edu/etd-project/1469.
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To provide a proper amount of quality training for tomorrow's automotive technicians, it will be necessary to provide more time for training or to develop a more efficient means of training. This project uses a HyperCard-based program to provide a starting point in increasing efficiency in instructional delivery and to continue to provide the skills necessary for a student to become a competent automotive technician.
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Pintard, Ludovic. "From safety analysis to experimental validation by fault injection - Case of automotive embedded systems." Phd thesis, Toulouse, INPT, 2015. http://oatao.univ-toulouse.fr/14459/1/Pintard.pdf.
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Due to the rising complexity of automotive Electric/Electronic embedded systems, Functional Safety becomes a main issue in the automotive industry. This issue has been formalized by the introduction of the ISO 26262 standard for functional safety in 2011. The challenges are, on the one hand to design safe systems based on a systematic verification and validation approach, and on the other hand, the fulfilment of the requirements of the ISO 26262 standard. Following ISO 26262 recommendations, our approach, based on fault injection, aims at verifying fault tolerance mechanisms and non-functional requirements at all steps of the development cycle, from early design phases down to implementation. Fault injection is a verification technique that has been investigated for a long time. However, the role of fault injection during design phase and its complementarities with the experimental validation of the target have not been explored. In this work, we investigate a fault injection continuum, from system design validation to experiments on implemented targets. The proposed approach considers the safety analyses as a starting point, with the identification of safety mechanisms and safety requirements, and goes down to the validation of the implementation of safety mechanisms through fault injection experiments. The whole approach is based on a key fault injection framework, called FARM (Fault, Activation, Readouts and Measures). We show that this approach can be integrated in the development process of the automotive embedded systems described in the ISO 26262 standard. Our approach is illustrated on an automotive case study: a Front-Light system.
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Cheikh, M'hand Mohamed. "Etude du canal de propagation radio pour les systèmes embarqués sans fil automobile." Phd thesis, Toulouse, INPT, 2010. http://oatao.univ-toulouse.fr/17847/1/cheikh_mhand.pdf.
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Les forts besoins en matière d'économie de carburant, de réduction des coûts de maintenance et de diminution des accidents routiers, ont conduit à la conception et à la commercialisation d'une gamme de systèmes embarqués sans fil, installés dans les véhicules roulants terrestres. Or, il faudra surmonter plusieurs défis techniques pour que les divers bénéfices de ses systèmes se réalisent. Ce mémoire de thèse s'est déroulé au sein de l'entreprise Continental Automotive Systems et les laboratoires LAAS et LAPLACE de Centre National de la Recherche Scientifique. Les travaux ont porté sur le canal de propagation radiofréquence dans l'environnement du véhicule pour le système de surveillance de pression des pneumatiques (TPMS) et le système d'accès sans fil (PASE). Ils se sont répartis entre les expérimentations et des études théoriques visant à présenter des modèles efficaces de l'environnement de propagation, d'évaluer la qualité de communication et de proposer des solutions adaptées aux systèmes embarqués sans fil étudiés. Les résultats de simulation et de mesure montrent que nous pouvons bien cerner les mécanismes de propagation mis en jeu dans l'environnement véhicule, et d'adapter en conséquence les solutions protocolaires et antennaires.
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Mamani, A., G. Quispe, and C. Raymundo-Ibañeez. "Electromechanical Device for Temperature Control of Internal Combustion Engines." IOP Publishing Ltd, 2019. http://hdl.handle.net/10757/656303.
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Internal combustion engines are the most commonly used engines in the automotive world. However, these engines lack an overheating prevention system against cooling system failures when they exceed their normal operating temperature. Less experienced drivers (users) usually do not notice overheating until the engine stops, generating economic expenses in engine repairs. As such, this paper describes the design and construction of an electromechanical device to prevent engine overheating. This device is installed in a vehicle and operates independently from the electronic control unit (ECU); it records the coolant temperature and controls air admission to the engine of the vehicle in which it is installed. In addition, a new Arduino-based card will receive signals from a temperature sensor as input and process them according to its programming. Then, it will send signal outputs to the actuators: A servomotor, monitor, LED display, and buzzer. To control the intake flow, a butterfly valve is used with the servomotor. This valve partially or totally restricts the engine airflow, based on the temperature programmed for the Arduino, thus protecting the engine from overheating.
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Woo, Seog-hun. "Production systems and employment relations in the Korean automotive industry : a case study of the emergence of a hybrid production system at Kia Motors." Thesis, The University of Sydney, 2000. https://hdl.handle.net/2123/27772.
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This thesis analyses the interrelationship between production system and
employment relations in the Korean automotive industry. It includes a case study
of how Kia Motors sought to introduce a lean production system in two plants:
an older site in Seoul (the SI plant) and a newer site in the rural area of Asan
(the A3 plant). A key finding reported in the thesis is that a hybrid production
system emerged in each plant as the result of the interaction between external
variables and internal company-specific variables. Three key factors were
investigated in each plant: the production structure, the organisation of work,
and employment relations. Strong worker and union resistance to lean
production, on the ground that it would lead to work intensification, was
encountered by Kia Motors. The hybrid production system which emerged at
each plant contained elements of both the traditional mass production system
and the newer lean production system, although there were differences between
the approaches adopted at $1 and A3 plants. The thesis provides an alternative
perspective to other studies which have portrayed the Korean automotive
industry following either a Fordist mass production system or a Toyota-inspired
lean production system, and shows how Kia has developed its own hybrid
production system.
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Cridelich, Carine caroline. "Influence of retraint systems during an automobile crash : prediction of injuries for frontal impact sled tests based on biomechanical data mining." Thesis, Besançon, 2015. http://www.theses.fr/2015BESA2009.
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La sécurité automobile est l’une des principales considérations lors de l’achat d’un véhicule. Avant d’ être commercialisée, une voiture doit répondre aux normes de sécurité du pays, ce qui conduit au développement de systèmes de retenue tels que les airbags et ceintures de sécurité. De plus, des ratings comme EURO NCAP et US NCAP permettent d’évaluer de manière indépendante la sécurité de la voiture. Des essais catapultes sont entre autres effectués pour confirmer le niveau de protection du véhicule et les résultats sont généralement basés sur des valeurs de référence des dommages corporels dérivés de paramètres physiques mesurés dans les mannequins.Cette thèse doctorale présente une approche pour le traitement des données d’entrée (c’est-à-dire des paramètres des systèmes de retenue définis par des experts) suivie d’une classification des essais catapultes frontaux selon ces mêmes paramètres. L’étude est uniquement basée sur les données du passager, les données collectées pour le conducteur n’ étant pas assez complètes pour produire des résultats satisfaisants. L’objectif principal est de créer un modèle qui définit l’influence des paramètres d’entrées sur la sévérité des dommages et qui aide les ingénieurs à avoir un ordre de grandeur des résultats des essais catapultes selon la législation ou le rating choisi. Les valeurs biomécaniques du mannequin (outputs du modèle) ont été regroupées en clusters dans le but de définir des niveaux de dommages corporels. Le modèle ainsi que les différents algorithmes ont été implémentés dans un programme pour une meilleur utilisation quotidienneSafety is one of the most important considerations when buying a new car. The car has to achievecrash tests defined by the legislation before being selling in a country, what drives to the developmentof safety systems such as airbags and seat belts. Additionally, ratings like EURO NCAP and US NCAPenable to provide an independent evaluation of the car safety. Frontal sled tests are thus carried outto confirm the protection level of the vehicle and the results are mainly based on injury assessmentreference values derived from physical parameters measured in dummies.This doctoral thesis presents an approach for the treatment of the input data (i.e. parameters ofthe restraint systems defined by experts) followed by a classification of frontal sled tests accordingto those parameters. The study is only based on data from the passenger side, the collected datafor the driver were not enough completed to produce satisfying results. The main objective is tocreate a model that evaluates the input parameters’ influence on the injury severity and helps theengineers having a prediction of the sled tests results according to the chosen legislation or rating.The dummy biomechanical values (outputs of the model) have been regrouped into clusters in orderto define injuries groups. The model and various algorithms have been implemented in a GraphicalUser Interface for a better practical daily use
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Laubscher, Franciscus Xavierus. "A model to predict the effect of the radiator core and ambient conditions on the performance of the cooling system of a rally car." Pretoria : [s.n.], 2005. http://upetd.up.ac.za/thesis/available/etd-04172007-110452.
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Stroud, Trevor. "The development of an integrated model for the implementation of a product data management system at Delta Motor Corporation." Thesis, Port Elizabeth Technikon, 2003. http://hdl.handle.net/10948/224.
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Information technology in mature organisations is viewed as an enabler of teams working together in the product development process. Technology is no longer pursued as an end in itself, but for its contribution to cost control, product quality, and most importantly, time to profit. The focus of this research is the analysis of methodologies used to implement the Teamcenter Engineering Product Data Management (PDM) system at Delta Motor Corporation, which manages all of Delta’s CAD data. The main problem of this research is as follows: How can Delta Motor Corporation successfully implement the “Teamcentre Engineering” Product Data Management System? The main problem will be broken down into three distinct parts, namely the developing of a best practice process, analysing Delta’s implementation and making recommendations for improvement. The literature survey provides the basis for developing a best-practice process, which serves as a benchmark against which to evaluate the methodology used by Delta. Interviews were conducted with selected personnel who were involved in the implementation, and Tesch’s model for content analysis used to analyse the responses. The implementation process of Teamcenter Engineering at Delta was conducted in three phases and only the first was completed at the time of writing this research paper. For this reason, analysis revolves around the first phase of implementation, which was limited to the drawing office, while recommendations are made for the implementation of phase two and three, which roll-out this system to the rest of Delta and it’s supplier base.
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Woojin, Kim. "THE EVOLVING DIVERSITY OF CORPORATE SYSTEMS: A COMPARATIVE STUDY ON THE TOYOTA GROUP AND THE HYUNDAI MOTOR GROUP." Kyoto University, 2015. http://hdl.handle.net/2433/202661.
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Korremla, Shiva K. Sainoju. "Experimental investigation of steady state heat transfer phenomenon in Pontiac G6 vehicle exhaust system." To access this resource online via ProQuest Dissertations and Theses @ UTEP, 2007. http://0-proquest.umi.com.lib.utep.edu/login?COPT=REJTPTU0YmImSU5UPTAmVkVSPTI=&clientId=2515.
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Marx, Neigel. "Gestion énergétique et dimensionnement des systèmes hybrides multi-pile à combustible et batterie pour application au transport automobile." Thesis, Bourgogne Franche-Comté, 2017. http://www.theses.fr/2017UBFCD053/document.
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L’essor de l’électrification du secteur du transport facilite le développement de nouvelles technologies. La pile à combustible n’est pas une technologie récemment développée mais elle en profite également. Toutefois, malgré les efforts entrepris jusqu’à présent, elle reste trop couteuse et peu durable par rapport aux exigences du marché. Pour cela, augmenter le rendement du système, réduire le nombre d’auxiliaire et obtenir une meilleure compréhension des phénomènes de dégradation semblent être les pistes les plus pertinentes. Les thématiques, non centrés sur les matériaux, étudiées dans le but de pallier ces différentes barrières technologiques sont principalement orientées sur la gestion du système et la définition et le pilotage d’auxiliaires ad-hoc. En parallèle, une part grandissante de la communauté scientifique s’intéresse également aux systèmes composés de plusieurs piles à combustible, lesquels pourraient permettre de lever également ces barrières technologiques. Dans le cadre de cette thèse, c’est la gestion et le dimensionnement de systèmes multipiles hybridés avec une batterie qui sera étudié. Premièrement, nous comparerons les performances des systèmes multipiles à celles des systèmes monopiles conventionnels. Pour cela, une étude basée sur l'optimisation de la gestion énergétique du système en fonction du dimensionnement est effectuée en utilisant la programmation dynamique. La variable optimisé est le coût d’exploitation. Il prend en compte le coût du carburant et de la dégradation du système. Les résultats obtenus indiquent une nette augmentation des performances au niveau de la consommation et de la durée de vie du système en faveur des systèmes multipiles et ce quel que soit le dimensionnement envisagé. Ensuite, nous concevrons une stratégie de gestion en ligne basée sur la théorie de décision bayésienne. Cette stratégie a pour but d’optimiser la consommation et la durée de vie en se basant sur la connaissance du comportement du conducteur. Trois modules la composent. Le premier module identifie les similarités du parcours en cours à ceux déjà effectués par le conducteur. Le deuxième se sert de cette connaissance pour déterminer le nombre de systèmes piles à combustible à démarrer. Finalement, la dernière partie détermine le niveau de puissance pour chacune des sources composant le système. L’approche proposée a été comparée à d’autres méthodes de gestion énergétique et permet d’obtenir un gain de performance au niveau de la consommation et de la durée de vie du système multipile dans la plupart des cas d’utilisationThe electrification of the transportation industry is on the rise. This rise drives the development of new technologies. Although the fuel cell is not a recently developed technology, it benefits from it. However, it is still too expensive and not durable enough compared to the market's expectations. Scientific research has been focused primarily on their management and its ancillaries. Nevertheless, the interest in multistack fuel cell systems has been rising in the community.The energy management and the sizing of multistack system hybrized with a battery is the focus of this thesis. First, the performances of such systems is compared to that of single stack systems. To that end, a study based on the determination of the optimal management strategy depending on the sizing has been completed. The main tool used in this study was optimization through dynamic programming. Results show a significant increase in performance in favor of multistack systems. Then, an online energy management strategy is designed based on Bayesian decision theory. Its goal is to optimize consumption and lifetime by using driver behavior knowledge. This approach has been compared to other energy management strategies and enables performances gains in consumption and lifetime for the multistack system
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Jaspart, Marie C. "Emergence in Vehicle Design: Using the Concept of Emergence to Provide a New Perspective on the Creative Phases of the Automobile Design Process." University of Cincinnati / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1275072173.
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Han, Yong-Hee. "Dynamic Sequencing of Jobs on Conveyor Systems for Minimizing Changeovers." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/4877.
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This research investigates the problem of constrained sequencing of a set of jobs on a conveyor system with the objective of minimizing setup cost. A setup cost is associated with extra material, labor, or energy required due to the change of attributes in consecutive jobs at processing stations. A finite set of attributes is considered in this research. Sequencing is constrained by the availability of two elements ??orage buffers and conveyor junctions. The problem is motivated by the paint purge reduction problem at a major U.S. automotive manufacturer. First, a diverging junction with a sequence-independent setup cost and predefined attributes is modeled as an assignment problem and this model is extended by relaxing the initial assumptions in various ways. We also model the constrained sequencing problem with an off-line buffer and develop heuristics for efficiently getting a good quality solution by exploiting the special problem structure. Finally, we conduct sensitivity analysis using numerical experiments, explain the case study, and discuss the use of the simulation model as a supplementary tool for analyzing the constrained sequencing problem.
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Torres, Sacristan Marc. "Analysis and design of heating systems for advanced automotive Radomes." Doctoral thesis, Universitat de Barcelona, 2021. http://hdl.handle.net/10803/672689.
Full textAbstract:
The main purpose of this thesis is to study how we could obtain a transparent heating system for a Radome. In the context of this thesis, transparent have two different meanings that are tied due to the objective of our research. First, transparent means that the heating system have not to disturb the electromagnetic radiation from the radar. And, secondly, and because of the industrial nature of this thesis, the heating system have not to be seen by an external observer, or, we can also say that it has not to disturb the aspect of the exterior decoration of the Radome.
After previous studies of different possible options, we get focus on Transparent Conductive Oxides (TCO) applications to get a heating system different from these that already exist to warm, defrost, and avoid ice on the surface of Radomes used on some vehicles [1], [2], [3]. Different elements and concepts needed to be considered for the developing of the TCO:
- How to deposit TCO
- Optimal sheet resistance
- Optimal circuit designs
- Effect of radar polarization
- Attenuation of radar electromagnetic waves
- Adhesion of the TCO on the substrate
- Heating and attenuation requirements from vehicle’s companies
- Electrical connection and Power supply
Considering all the points mentioned we will be able to design two different heating systems based on TCO’s that are transparent to the human eye and minimize the attenuation of electromagnetic radiation of the radar.
The TCO depositions are used in two different ways depending on how important the polarization of the radar radiation is for the heating system, this way we can differentiate two heating systems:
First, we see from previous studies made at the company, that a very thin film with a high resistance, more than 3500 Ohms/square, is almost transparent to the radar and it does not require any more process than the deposition. In this case the most important point is that no definite orientation of the film is needed since the film is homogeneous. So, it is not conditioned by the polarization of the radar radiation. In this part of the thesis, we develop thin film coatings of Indium Tin Oxide (ITO) and Al doped ZnO (AZO) at the Univeristy of Barcelona and at the University of Zaragoza. The development of this system is explained in chapter 3.
Secondly, we developed a system similar to those we have today commercially that uses copper heating wires, but in our approach, we do it with TCO wires that are not visible for human eye and that are placed on the surface of the Radome. In this way we improve the thermal efficiency of the heating system with respect to copper wires systems since our heating system is almost in direct contact to ice and water, solely a film of few microns of varnish would protect the system from the outside in a real case. In this case the attenuation of radar radiation caused by the heating system is between -0.1 dB and -0.2 dB. when the heating wires are correctly oriented with the radar polarization. In this part of the Thesis, we just use ITO as the TCO material for the wires. The development of this system is explained in chapter 5.El principal propòsit d’aquesta tesis és estudiar com podem aconseguir un sistema d’escalfament transparent per a un Radome. En el context de la tesis, transparent té dos significats diferents però lligats degut als objectius de la recerca. Primer, transparent es refereix a que el sistema d’escalfament no ha de destorbar la radiació electromagnètica del radar. I, segon, i degut a la naturalesa industrial de la tesis, el sistema d’escalfament no ha de se visible per un observador exterior, o, dit d’una altre manera no pot destorbar l’aspecte de la decoració exterior del Radome. Després d’un estudi previ de diferents possible opcions, ens hem centrat en l’ús de Òxids Conductors Transparents (o TCO per les sigles en anglès) per tal d’aconseguir un sistema d’escalfament diferent als que existeixen per escalfar, descongelar i evitar el gel a la superfície dels Radomes utilitzats en alguns vehicles [1],[2],[3]. La manera com hem utilitzat els dipòsits de TCO es poden diferenciar a partir de com d’important és la polarització de la radiació del radar pel sistema d’escalfament, d’aquesta manera podem diferencia dos sistemes d’escalfament: Primer, a partir d’ una capa molt prima amb una resistència per sobre dels 3500 Ohms/quadrat , que és pràcticament invisible pel radar i no requereix cap més procés de dipòsit. En aquest cas el punt més important és que no hi ha cap orientació preferida del sistema ja que la capa és homogènia en tota la superfície. Segon, desenvolupem un sistema amb fils de ITO que no son visibles per l’ull humà col·locats a la superfície del Radome. En aquest cas l’atenuació produïda a la radiació del radar pel sistema d’escalfament estaria entre els -0.1 dB i els -0.2 dB.
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Bou, Nader Wissam. "Méthodologie de choix et d'optimisation de convertisseurs d'énergie pour les applications chaînes de traction automobile." Thesis, Paris Sciences et Lettres (ComUE), 2019. http://www.theses.fr/2019PSLEM047.
Full textAbstract:
D'importants efforts de recherche ont été investis dans l'industrie automobile sur les nouveaux carburants et les nouvelles chaînes de traction hybride électrique afin de réduire les émissions de carbone des véhicules. La consommation de carburant de ces groupes motopropulseurs hybrides dépend des performances du convertisseur d'énergie utilisé, des besoins énergétiques du véhicule, ainsi que de la stratégie de gestion énergétique déployée à bord. Cette thèse examine le potentiel de nouveaux convertisseurs d'énergie comme substitut du moteur thermique à combustion interne (ICE). Les systèmes de turbines à gaz sont considérés comme des convertisseurs d'énergie potentiel pour les chaînes de traction hybride série (SHEV), car ils offrent de nombreux avantages intrinsèques à l'automobile, tels que la capacité de fonctionner avec plusieurs carburants, la compacité, la réduction du nombre de pièces mobiles, la réduction du bruit et des vibrations. Une analyse exergo-technologique explicite est proposée pour identifier les configurations thermodynamiques réalistes. Une étude préconceptionnelle a été réalisée pour déterminer les rapports puissance/poids de ces systèmes. Un modèle SHEV est développé et les composants du groupe motopropulseur sont dimensionnés en fonction des critères de performance du véhicule. Des simulations de consommation sont effectuées sur le cycle d’homologation WLTC, en prenant en compte les besoins en énergie électrique et thermique du véhicule en plus des besoins en énergie mécanique, et en utilisant une méthode innovante d'optimisation comme stratégie de gestion de l'énergie. Le cycle turbine à gaz (avec compression refroidie, régénérateur et réchauffe durant la détente (IRReGT)) est priorisé car il offre un rendement et une densité de puissance plus élevés ainsi qu'une consommation de carburant réduite par rapport aux autres systèmes investigués. De plus, un modèle dynamique a été développé et des simulations ont été effectuées pour tenir compte de la surconsommation de carburant pendant les phases transitoires du démarrage. Des essais ont également été mis en œuvre sur certains sous-systèmes du cycle IRReGT identifié. Les résultats montrent une amélioration de la consommation de carburant avec l'IRReGT comme groupe auxiliaire de puissance par rapport à l'ICE. Par conséquent, le système IRReGT sélectionné présente un potentiel, non négligeable, qui remplacerait le moteur thermique à combustion interne dans les futures chaînes de traction hybride électriquesSignificant research efforts have been invested in the automotive industry on alternative fuels and new hybrid electric powertrain in attempt to reduce carbon emissions from passenger cars. Fuel consumption of these hybrid powertrains strongly relies on the energy converter performance, the vehicle energetic needs, as well as on the energy management strategy deployed on-board. This thesis investigates the potential of new energy converters as substitute of actual internal combustion engine in automotive powertrain applications. Gas turbine systems is identified as potential energy converter for series hybrid electric vehicle (SHEV), as it offers many automotive intrinsic benefits such as multi-fuel capability, compactness, reduced number of moving parts, reduced noise and vibrations among others. An exergo-technological explicit analysis is conducted to identify the realistic GT-system thermodynamic configurations. A pre-design study have been carried out to identify the power to weight ratios of those systems. A SHEV model is developed and powertrain components are sized considering vehicle performance criteria. Energy consumption simulations are performed on the worldwide-harmonized light vehicles test cycle (WLTC), which account for the vehicle electric and thermal energy needs in addition to mechanical energy needs, using an innovative bi-level optimization method as energy management strategy. The intercooled regenerative reheat gas turbine (IRReGT) cycle is prioritized, offering higher efficiency and power density as well as reduced fuel consumption compared to the other investigated GT-systems. Also a dynamic model was developed and simulations were performed to account for the over fuel consumption during start-up transitory phases. Tests were also performed on some subsystems of the identified IRReGT-system. Results show improved fuel consumption with the IRReGT as auxiliary power unit (APU) compared to ICE. Consequently, the selected IRReGT-system presents a potential for implementation on futur SHEVs