Дисертації з теми "Automatic fault analysis"
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся з топ-38 дисертацій для дослідження на тему "Automatic fault analysis".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Переглядайте дисертації для різних дисциплін та оформлюйте правильно вашу бібліографію.
Nilsson, Markus. "A tool for automatic formal analysis of fault tolerance." Thesis, Linköping University, Department of Computer and Information Science, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-4435.
Повний текст джерелаThe use of computer-based systems is rapidly increasing and such systems can now be found in a wide range of applications, including safety-critical applications such as cars and aircrafts. To make the development of such systems more efficient, there is a need for tools for automatic safety analysis, such as analysis of fault tolerance.
In this thesis, a tool for automatic formal analysis of fault tolerance was developed. The tool is built on top of the existing development environment for the synchronous language Esterel, and provides an output that can be visualised in the Item toolkit for fault tree analysis (FTA). The development of the tool demonstrates how fault tolerance analysis based on formal verification can be automated. The generated output from the fault tolerance analysis can be represented as a fault tree that is familiar to engineers from the traditional FTA analysis. The work also demonstrates that interesting attributes of the relationship between a critical fault combination and the input signals can be generated automatically.
Two case studies were used to test and demonstrate the functionality of the developed tool. A fault tolerance analysis was performed on a hydraulic leakage detection system, which is a real industrial system, but also on a synthetic system, which was modeled for this purpose.
Deosthale, Eeshan Vijay. "Model-Based Fault Diagnosis of Automatic Transmissions." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1542631227815892.
Повний текст джерелаAbdul-Raheem, Khalid Fatihi. "Automatic bearing fault diagnostics using wavelet analysis and an artificial neural network." Thesis, Glasgow Caledonian University, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.493933.
Повний текст джерелаValle-Cervantes, Sergio. "Plant-wide monitoring of processes under closed-loop control." Access restricted to users with UT Austin EID Full text (PDF) from UMI/Dissertation Abstracts International, 2001. http://wwwlib.umi.com/cr/utexas/fullcit?p3035991.
Повний текст джерелаLabuschagne, P. J. "Automatic clustering with application to time dependent fault detection in chemical processes." Pretoria : [s.n.], 2009. http://upetd.up.ac.za/thesis/available/etd-07062009-142237.
Повний текст джерелаJi, Liang. "Improving fault location through interpole analysis of circuit breaker and automatic reclose scheme operation." Thesis, University of Strathclyde, 2012. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=19009.
Повний текст джерелаYang, Hongyu. "Automatic Fault Diagnosis of Rolling Element Bearings Using Wavelet Based Pursuit Features." Thesis, Queensland University of Technology, 2005. https://eprints.qut.edu.au/16062/1/Hongyu_Yang_Thesis.pdf.
Повний текст джерелаYang, Hongyu. "Automatic Fault Diagnosis of Rolling Element Bearings Using Wavelet Based Pursuit Features." Queensland University of Technology, 2005. http://eprints.qut.edu.au/16062/.
Повний текст джерелаLennartsson, Richard. "Automatic diagnostic system for I-shift transmission using vibration analysis." Thesis, Linköping University, Automatic Control, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-57732.
Повний текст джерелаThis master’s thesis work was performed at Volvo Powertrain in Köping, Sweden, which manufactures gearboxes and integrated transmission systems for heavy vehicles. The thesis is a continuation of a previous master’s thesis performed at the Köping factory in 2009. After manufacturing and assembly, each gearbox is manually validated to ensure the gearbox quality and functionality. When validating the gearbox gears, the operator shifts the gearbox in a predefined manner and listens for irregularities. If an error sound is heard the operator must then locate the source of error. With numerous of cog wheels rotating at the same time this task requires extensive knowledge and experience of the operator. The main objective is to develop an automatic diagnostic system for detection of cog errors and assist the operator in the process of locating the faulty component.
The work consists of two parts. In the first part the automatic diagnostic system is developed and a database of gearbox recordings is stored. The amounts of logged non-faulty gearboxes are significantly much larger (50) than the logged faulty gearboxes (1). Therefore, when determining thresholds needed for the diagnosis, the data obtained from the non-faulty gearboxes are used. Two statistical methods are presented to extract the thresholds. The first method uses an extremevalue distribution and the other method a Gaussian distribution. When validated, both methods did successfully detect on cog faults. In the second part an investigation is made of how shaft imbalance can be detected and implemented in the developed system.
Volvo Powertrain continually follows-up all faults found at the validation station to ensure the quality of their work and eliminate the sources of error. During system testing one logged gearbox was found faulty. The automatic diagnostic system did successfully detect and locate the faulty component which later also was confirmed when the gearbox was dismounted. With only one detected error it is difficult to conclude the system performance and further testing is required. However, during the testing no false detections were made.
Zornoza, Moreno Enrique. "Model-based approach for automatic generation of IEC-61025 standard compliant fault trees." Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-40912.
Повний текст джерелаAMASS project
Yalda, Riad, and Miroslav Urosevic. "Automatic post-fault analysis based on disturbance data stored in substation devices : Approach towards the preventive maintenance." Thesis, KTH, Hälsoinformatik och logistik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-252823.
Повний текст джерелаDenna rapport studerar möjligheten att minimera oönskade underhållsarbeten och öka tillgången på strömförsörjning genom att möjliggöra förebyggande underhåll i kraftsystemet, utan att behöva göra ytterligare investeringar för sina befintliga system. Detta gjordes med hjälp av information från COMTRADE-filer (filer för inspelning av störningar) som skapades vid ett fel i elnätet. IEC 61850-standarden underlättar processen för att hämta och analysera störningsfilerna genom att standardisera sitt format och hur de lagras. Genom att skapa en programvarulösning som automatiskt läser och analyserar COMTRADE-filerna, kan försämrad prestanda hos strömsystemets utrustning detekteras och förebyggande underhåll föreslås. Resultatet av projektet är en mjukvarulösning som läser och analyserar COMTRADE-filer på ett automatiserat sätt. Programvaran identifierar felhändelser (fel start, sänd bryt-signal, brytare öppen, automatisk återstängnings kommando, strömbrytare stängd) från de inspelade signalerna med wavelettransformen som huvudmetod. Därefter beräknas driftstiderna för relä och brytare. De beräknade tiderna jämförs med tröskelvärden och varningar genereras om de överskrider tröskelvärdena.
Meless, Dejen. "Test Cycle Optimization using Regression Analysis." Thesis, Linköping University, Automatic Control, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-54809.
Повний текст джерелаIndustrial robots make up an important part in today’s industry and are assigned to a range of different tasks. Needless to say, businesses need to rely on their machine park to function as planned, avoiding stops in production due to machine failures. This is where fault detection methods play a very important part. In this thesis a specific fault detection method based on signal analysis will be considered. When testing a robot for fault(s), a specific test cycle (trajectory) is executed in order to be able to compare test data from different test occasions. Furthermore, different test cycles yield different measurements to analyse, which may affect the performance of the analysis. The question posed is: Can we find an optimal test cycle so that the fault is best revealed in the test data? The goal of this thesis is to, using regression analysis, investigate how the presently executed test cycle in a specific diagnosis method relates to the faults that are monitored (in this case a so called friction fault) and decide if a different one should be recommended. The data also includes representations of two disturbances.
The results from the regression show that the variation in the test quantities utilised in the diagnosis method are not explained by neither the friction fault or the test cycle. It showed that the disturbances had too large effect on the test quantities. This made it impossible to recommend a different (optimal) test cycle based on the analysis.
Barrera, Núñez Víctor Augusto. "Automatic diagnosis of voltage disturbances in power distribution networks." Doctoral thesis, Universitat de Girona, 2012. http://hdl.handle.net/10803/80944.
Повний текст джерелаEn esta tesis se propone una metodología para la identificación de la localización relativa (aguas arriba/abajo) y la causa de una perturbación eléctrica. La metodología utiliza las ondas trifásicas de tensión y de corriente registradas en redes de distribución radial sin presencia de generación distribuida. La metodología es validada utilizando perturbaciones eléctricas reales y simuladas. La metodología involucra atributos que han sido concebidos basándose en principios eléctricos e hipótesis de acuerdo a cada uno de los fenómenos eléctricos analizados. Se propusieron atributos tanto basados en la forma de onda como en la fecha de ocurrencia de la perturbación. La cantidad de información contenida y/o explicada por cada atributo es valorada mediante la aplicación del análisis multivariante de la varianza y algoritmos de extracción automática de reglas de decisión. Los resultados de clasificación muestran que la metodología propuesta puede ser utilizada para el diagnóstico automático de perturbaciones eléctricas registradas en redes de distribución radial. Los resultados de diagnóstico pueden ser utilizados para apoyar las tareas de operación, mantenimiento y planeamiento de las redes de distribución.
Waly, Hashem. "Automated Fault Identification - Kernel Trace Analysis." Thesis, Université Laval, 2011. http://www.theses.ulaval.ca/2011/28246/28246.pdf.
Повний текст джерелаHu, Peifeng. "Automated fault localization a statistical predicate analysis approach /." Click to view the E-thesis via HKUTO, 2006. http://sunzi.lib.hku.hk/hkuto/record/B38838035.
Повний текст джерелаHu, Peifeng, and 胡佩鋒. "Automated fault localization: a statistical predicate analysis approach." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B38838035.
Повний текст джерелаAndersson, Johan. "Automated Fault Tree Generation from Requirement Structures." Thesis, Linköpings universitet, Fordonssystem, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-122471.
Повний текст джерелаRutaganda, Remmy. "Automated Model-Based Reliability Prediction and Fault Tree Analysis." Thesis, Linköpings universitet, Institutionen för datavetenskap, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-67240.
Повний текст джерелаSingh, Shailendra. "Automated fault injection and analysis for wired/wireless networks." Diss., Online access via UMI:, 2009.
Знайти повний текст джерелаKincl, Zdeněk. "Metody pro testování analogových obvodů." Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-233583.
Повний текст джерелаHossack, John A. "A multi-agent system for automated post-fault disturbance analysis." Thesis, University of Strathclyde, 2005. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=21606.
Повний текст джерелаHogan, Paul Anthony. "A knowledge-based system for automated fault analysis of hydraulic systems." Thesis, University of Bath, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.332776.
Повний текст джерелаOrdonio, Robert Romero. "An automated tool to facilitate code translation for software fault tree analysis." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1993. http://handle.dtic.mil/100.2/ADA273205.
Повний текст джерелаLi, Tianpei. "Fault Diagnosis for Functional Safety in Electrified and Automated Vehicles." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1587583790925718.
Повний текст джерелаWinter, Mathias William. "Software fault tree analysis of an automated control system device written in Ada." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1995. http://handle.dtic.mil/100.2/ADA303377.
Повний текст джерелаPatil, Mayur. "Test Scenario Development Process and Software-in-the-Loop Testing for Automated Driving Systems." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1574794282029419.
Повний текст джерелаWeerasinghe, Manori. "Fault detection and diagnosis for complex multivariable processes using neural networks." Thesis, Liverpool John Moores University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298141.
Повний текст джерелаKönig, Johan. "Analyzing Substation Automation System Reliability using Probabilistic Relational Models and Enterprise Architecture." Doctoral thesis, KTH, Industriella informations- och styrsystem, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-145006.
Повний текст джерелаQC 20140505
Russell, Kevin Joseph. "Model-Centric Interdependent Critical Infrastructure System Recovery Analysis and Metrics." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/71671.
Повний текст джерелаPh. D.
Hameed, Muhammad Muzaffar, and Muhammad Zeeshan ul Haq. "DefectoFix : An interactive defect fix logging tool." Thesis, Blekinge Tekniska Högskola, Avdelningen för programvarusystem, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-5268.
Повний текст джерелаYoshida, Everton Shigueaki. "Algoritmos para análise automática de faltas em sistemas elétricos de potência." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/3/3143/tde-29122014-175150/.
Повний текст джерелаThis work presents the development of algorithms for the automatic analysis of overcurrent events in electrical power systems. The algorithms proposed in this paper are based on data of voltages and currents recorded by intelligent electronic devices (digital oscillographs and / or protection relays) installed in electrical networks, which can evaluate the operating state of these networks based on this information. The algorithms incorporate an automatic system for overcurrent analysis, which is able to estimate the time of occurrence of the event, identify the steps involved and classify the fault type using the phasors of voltages and currents calculated from their records. Furthermore, this work presents a comparison between two distinct techniques for phasor calculation (the first one uses the Discrete Fourier Transform, with a cycle window, and the second one is based on genetic algorithms) and three distinct techniques to estimate the time of the occurrence of the event (the first is based on Fourier Transform and a digital filter that implements a probability density function, the second one replaces Fourier transform by Genetic Algorithm and the third one is based on Park transform). For the evaluation of the developed algorithms, cases from two distribution network model have been generated in the ATP software - Alternative Electromagnetic Transients Program, additionally, actual data from distribution Brazilian utilities systems were also analyzed by the developed algorithm.
Plönnigs, Jörn. "Control Network Performance Engineering." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2007. http://nbn-resolving.de/urn:nbn:de:swb:14-1189518885137-19770.
Повний текст джерелаDuring the design of large automation networks, performance analysis methods can be used for testing and dimensioning the network before implementation and are essential for an efficient and reliable design process. However, setting up the necessary analytical or simulative models is time-consuming, requires in-depth knowledge, and is therefore often not applicable in practice. The network designers are much more used to the design tools used to develop automation networks. Based on these tools' databases various methods for automated system and traffic modeling, performance analysis and diagnoses are combined in the control network performance engineering that seamlessly integrates quality analysis and consulting into network design without requiring additional effort. (This manuscript is also available - in the form of a book - from Jörg Vogt Verlag, Voglerstr. 20, 01277 Dresden, Germany world-wide web address: http://www.vogtverlag.de/, electronic-mail address: info@vogtverlag.de, ISBN 978-3-938860-10-6 )
Ganapathy, Priya. "Development and Evaluation of a Flexible Framework for the Design of Autonomous Classifier Systems." Wright State University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=wright1261335392.
Повний текст джерелаTrajin, Baptiste. "Analyse et traitement de grandeurs électriques pour la détection et le diagnostic de défauts mécaniques dans les entraînements asynchrones. Application à la surveillance des roulements à billes." Phd thesis, Institut National Polytechnique de Toulouse - INPT, 2009. http://tel.archives-ouvertes.fr/tel-00554240.
Повний текст джерелаMusaruddin, Mustarum. "Automatic fault analysis in power systems via application service provider." Thesis, 2011. http://hdl.handle.net/2440/70281.
Повний текст джерелаThesis (Ph.D.) -- University of Adelaide, School of Electrical and Electronic Engineering, 2011
Hsieh, Chih-Sheng, and 謝志勝. "Improving Feedback Time of Steelmaking Process by Big Data Analytics and Machine Learning Techniques for Automatic Instrument Fault Analysis." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/70750487989019391690.
Повний текст джерела國立高雄應用科技大學
電機工程系博碩士班
105
The chemical analysis of steel is the key point of the steel-making process in the steel industry. International famous steelmaking plants have begun to automate to take the place of traditional artificial manual analysis. Traditional automate cannot be able to undertake these heavy tasks in the competitive international industry with the popularity of automatic analysis technique and the rising of the technological capability. It’s most important to develop the intelligent system by broken the traditional thinking of chemical analysis automate system. This study applies Machine Learning and Data Mining under the concept of automation more intelligent in Industry 4.0 to analysis the cause of equipment failure. This study still find out the best factor of train information by using support vector machines(SVM),and using support vector regression(SVR) to find out the relationship between automation equipment and analysis feedback time. Then we can make sure the most important equipment which inference the analysis feedback time and improve it by using Multiple Regression Analysis. This study reveals that this way determines relevant factors correctly, and promotes the timeliness of automation during steel-making process effectively; in addition, it reduces required labor costs and time in data analysis. Especially, the study indicates not to aim at the equipment that breakdown easily, and differs from the traditional way.
Yap, Choon-Shian, and 葉俊賢. "LOAD ANALYSIS AND FAULT RESTORATION IN DISTRIBUTION AUTOMATION USING NCKU DISTRIBUTION NETWORK." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/44951082013744595476.
Повний текст джерела國立成功大學
電機工程研究所
82
This thesis proposes a distribution automation case study for National Cheng Kung University (NCKU). Supporting from possible re-installation plan in NCKU, an effective and reasonable method to restore the non-faulted out-of-service area is proposed. The proposed method in this thesis is combined with a fully automated distribution system. In the control center, distribution engineers can recieve the information of the distribution system. When a fault has been detected, distribution engineers can isolate the faulted zone, restore the non-faulted out-of-service area through the control of switches and tie-switches in the automated distribution system. Using load flow calculation method to analyze and modify various loading case of the possible outage area, therefore the solution can determine the priority of the tie-switch for each outage case and establish a restoration data base. At the instant of fault,a suitable solution is directly searched from this data base to restore the out-of-service area. This thesis also suggests a load estimation calculation method to revise the data base. It can make the system operation with more safe and efficient. Distribution system in NCKU, feeders are connected radially.In this research, the parameters of this distribution system were determined to set up in data base. Through the Z-loop load flow method and the characteristic realization of this system, a suitable restoration data base which is under any condition of all possible outage areas has been established.
Yan, Jiaxiang. "Modeling, monitoring and optimization of discrete event systems using Petri nets." 2014. http://hdl.handle.net/1805/3874.
Повний текст джерелаYan, Jiaxiang. M.S.E.C.E., Purdue University, May 2013. Modeling, Monitoring and Optimization of Discrete Event Systems Using Petri Nets. Major Professor: Lingxi Li. In last decades, the research of discrete event systems (DESs) has attracts more and more attention because of the fast development of intelligent control strategies. Such control measures combine the conventional control strategies with discrete decision-making processes which simulate human decision-making processes. Due to the scale and complexity of common DESs, the dedicated models, monitoring methods and optimal control strategies for them are necessary. Among various DES models, Petri nets are famous for the advantage in dealing with asynchronous processes. They have been widely applied in intelligent transportation systems (ITS) and communication technology in recent years. With encoding of the Petri net state, we can also enable fault detection and identification capability in DESs and mitigate potential human errors. This thesis studies various problems in the context of DESs that can be modeled by Petri nets. In particular, we focus on systematic modeling, asynchronous monitoring and optimal control strategies design of Petri nets. This thesis starts by looking at the systematic modeling of ITS. A microscopic model of signalized intersection and its two-layer timed Petri net representation is proposed in this thesis, where the first layer is the representation of the intersection and the second layer is the representation of the traffic light system. Deterministic and stochastic transitions are both involved in such Petri net representation. The detailed operation process of such Petri net representation is stated. The improvement of such Petri net representation is also provided with comparison to previous models. Then we study the asynchronous monitoring of sensor networks. An event sequence reconstruction algorithm for a given sensor network based on asynchronous observations of its state changes is proposed in this thesis. We assume that the sensor network is modeled as a Petri net and the asynchronous observations are in the form of state (token) changes at different places in the Petri net. More specifically, the observed sequences of state changes are provided by local sensors and are asynchronous, i.e., they only contain partial information about the ordering of the state changes that occur. We propose an approach that is able to partition the given net into several subnets and reconstruct the event sequence for each subnet. Then we develop an algorithm that is able to reconstruct the event sequences for the entire net that are consistent with: 1) the asynchronous observations of state changes; 2) the event sequences of each subnet; and 3) the structure of the given Petri net. We discuss the algorithmic complexity. The final problem studied in this thesis is the optimal design method of Petri net controllers with fault-tolerant ability. In particular, we consider multiple faults detection and identification in Petri nets that have state machine structures (i.e., every transition in the net has only one input place and one output place). We develop the approximation algorithms to design the fault-tolerant Petri net controller which achieves the minimal number of connections with the original controller. A design example for an automated guided vehicle (AGV) system is also provided to illustrate our approaches.