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Dissertations / Theses on the topic 'Fault isolation and isolability'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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1

Mnassri, Baligh. "Analyse de données multivariées et surveillance des processus industriels par analyse en composantes principales." Phd thesis, Aix-Marseille Université, 2012. http://tel.archives-ouvertes.fr/tel-00749282.

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Ce mémoire de thèse présente une étude fondamentale enrichie par des contributions qui sont articulées autour de la modélisation de processus ainsi qu'un diagnostic de défauts en utilisant l'analyse en composantes principales (ACP). <br /> Dans l'objectif d'un choix optimal du modèle ACP, une étude comparative de quelques critères connus dans la littérature nous a permis de conclure que le problème rencontré est souvent lié à une ignorance des variables indépendantes et quasi-indépendantes. Dans ce cadre, nous avons réalisé deux démonstrations mettant en évidence les limitations de deux critèr
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Thurén, Mårten. "Fault Isolation By Manifold Learning." Thesis, Linköping University, Vehicular Systems, 1985. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-57547.

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<p>This thesis investigates the possibility of improving black box fault diagnosis by a process called manifold learning, which simply stated is a way of finding patterns in recorded sensor data. The idea is that there is more information in the data than is exploited when using simple classification algorithms such as k-Nearest Neighbor and Support Vector Machines, and that this additional information can be found by using manifold learning methods. To test the idea of using manifold learning, data from two different fault diagnosis scenarios is used: A Scania truck engine and an electrical s
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Biteus, Jonas. "Fault Isolation in Distributed Embedded Systems." Doctoral thesis, Linköping : Vehicular Systems, Department of Electrical Engineering, Linköpings universitet, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-8774.

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4

McFall, Charles W. "Integrated fault detection and isolation and fault-tolerant control of nonlinear process systems." Diss., Restricted to subscribing institutions, 2008. http://proquest.umi.com/pqdweb?did=1692812611&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.

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5

Wang, Lihui. "Rough set based gas turbine fault isolation study." Thesis, Cranfield University, 2010. http://dspace.lib.cranfield.ac.uk/handle/1826/5616.

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Gas path fault isolation is one of the key techniques in Engine Health Management systems. In order to accomplish gas path fault isolation successfully for a gas turbine engine, both an accurate off-design performance model and an effective fault isolation approach are necessary. In this thesis, two original and useful contributions to knowledge are presented: a new gas turbine off-design performance model adaptation approach and a new gas turbine fault isolation approach. This new adaptation approach uses optimal multiple scaling factors obtained by using a Genetic Algorithm to scale inaccura
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6

Sune, Dan. "Isolation of Multiple-faults with Generalized Fault-modes." Thesis, Linköping University, Department of Electrical Engineering, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1480.

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<p>Most AI approaches for fault isolation handle only the behavioral modes OK and NOT OK. To be able to isolate faults in components with generalized behavioral modes, a new framework is needed. By introducing domain logic and assigning the behavior of a component to a behavioral mode domain, efficient representation and calculation of diagnostic information is made possible. </p><p>Diagnosing components with generalized behavioral modes also requires extending familiar characterizations. The characterizations candidate, generalized kernel candidate and generalized minimal candidate are introd
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Wan, Abdul Aziz Wan Mohd Yusof Rahiman. "Fault detection and isolation : application to pipeline systems." Thesis, University of Manchester, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.498676.

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In this thesis, the development on Fault Detection and Isolation (FDI) and its application on the nonlinear pipeline based on an observer design techniques are presented. The main focus is to perform the analysis on pipeline systems characteristics and then, systematic approaches are designed for leak diagnosis system based on transient response. In order to monitor the transient response,three different types of observer designs are introduced in this work together with different aspects of leakage are discussed. Each of the presented observer design methods significantly reduce the required
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8

Stoeckle, Matthew Robert. "Fault detection, isolation, and recovery for autonomous parafoils." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/90612.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 2014.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages 121-124).<br>Autonomous precision airdrop systems are widely used to deliver supplies to remote locations. This aerial delivery method provides a safety and logistical advantage over traditional ground- or helicopter-based payload transportat
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9

Zhang, Ze. "Fault detection and isolation for linear dynamic systems." Thesis, Imperial College London, 2011. http://hdl.handle.net/10044/1/9086.

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As modern control systems and engineering processes become increasingly more complex and integrated, the consequences of system failures and faults can be disastrous environmentally and economically. This thesis considers the fault detection and isolation (FDI) problem for linear time-invariant (LTI) systems subject to faults, disturbances and model uncertainties. Firstly, a novel on-line approach to the robust FDI problem for linear discrete-time systems is proposed by using input/output measurement analysis over a finite estimation horizon. Upper and lower bounds on the fault signal are comp
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10

Ding, Xuejun. "Fault detection and isolation for railway vehicle suspensions." Thesis, University of Leeds, 2009. http://etheses.whiterose.ac.uk/11297/.

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The ability to detect and isolate component faults in a railway suspension system is important for improved train safety and maintenance. An undetected failure in the suspension systems can cause severe wheel-rail wear, reduce ride comfort, worsen passenger safety and increase unexpected maintenance costs. Existing fault detection methods are limited in several respects, such as effectiveness/sensitivity for fault detection, or robustness to external condition changes. This thesis investigates a model-less fault detection and isolation approach using cross correlation and/or relative variance
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11

Tan, Chee Pin. "Sliding mode observers for fault detection and isolation." Thesis, University of Leicester, 2002. http://hdl.handle.net/2381/30204.

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This thesis describes the use of a class of sliding mode observers for fault detection and isolation purposes. Existing work has shown that the equivalent output error injection term associated with the sliding mode observer, which represents the average value of the nonlinear switched term (which induces and maintains the sliding motion), if properly scaled, yields accurate reconstructions of actuator faults. Existing observer design methods generate a certain class of observer gains, but do not utilise all degrees of freedom. In this thesis, a new method, exploiting this freedom is presented
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12

Bergkvist, Conny, and Stefan Wikner. "Self-organizing maps for virtual sensors, fault detection and fault isolation in diesel engines." Thesis, Linköping University, Department of Electrical Engineering, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2757.

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<p>This master thesis report discusses the use of self-organizing maps in a diesel engine management system. Self-organizing maps are one type of artificial neural networks that are good at visualizing data and solving classification problems. The system studied is the Vindax(R) development system from Axeon Ltd. By rewriting the problem formulation also function estimation and conditioning problems can be solved apart from classification problems. </p><p>In this report a feasibility study of the Vindax(R) development system is performed and for implementation the inlet air system is diagnosed
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Suda, Jessica Lynn. "Misfire-Fault Classification for Future On-Board Diagnostics III Vehicles." OpenSIUC, 2018. https://opensiuc.lib.siu.edu/theses/2372.

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Current OBD-II vehicle systems detect misfires by monitoring slight variances of crankshaft acceleration throughout power-strokes of each of the engine’s cylinders. If the PCM determines that the acceleration of the engine’s crankshaft is inappropriate, it concludes a misfire is detected. However, after this misfire is detected, the technician still needs to diagnose (isolate) the root-cause. Diagnosis is no easy task, especially with several potential subsystems that could be at fault: fuel injection, air-intake, sparkignition, and engine-mechanical. With this being said, it is difficult for
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14

Cornell, Axel. "Probabilistic Fault Isolation in Embedded Systems Using Training Data." Thesis, KTH, Reglerteknik, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-105874.

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In the heavy vehicle industry customers, laws and increasingly complex processes demand methods of supervising every aspect of a truck. Fault isolation systems are introduced to do just that. In order to assure a sustainable development new types of isolation systems are investigated to substitute the consistency based isolation systems of today. In this thesis an application of a probabilistic isolation method that ranks possible faults on their likeliness of being a fault in the process is implemented and evaluated as a possible future replacement of today's system. This method bases the iso
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15

Cherubal, Sasikumar. "Fault isolation and diagnosis techniques for mixed-signal circuits." Diss., Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/15450.

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Chaitanya, Deshpande. "Multi-Agent Based Fault Localizationand Isolation in Active DistributionNetworks." Thesis, KTH, Industriella informations- och styrsystem, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-169221.

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Liberalized electricity markets, increased awareness of clean energy resources and theirdecreasing costs have resulted in large numbers of distributed power generators beinginstalled on distribution network. Installation of distributed generation has altered thepassive nature of distribution grid. A concept of Active Distribution Network is proposedwhich will enable present day infrastructure to host renewable energy resources reliably.Fault management that includes fault localization, isolation and service restoration ispart of active management of distribution networks.This thesis aims to in
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17

Liu, Y. "Fault detection and isolation for wind turbine dynamic systems." Thesis, Liverpool John Moores University, 2018. http://researchonline.ljmu.ac.uk/8524/.

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This work presents two fault detection and isolation (FDI) approaches for wind turbine systems (WTS). Firstly, a non-linear mathematical model for wind turbine (WT) dynamics is developed. Based on the developed WTS mathematical model, a robust fault detection observer is designed to estimate system faults, so as to generate residuals. The observer is designed to be robust to system disturbance and sensitive to system faults. A WT blade pitch system fault, a drive-train system gearbox fault and three sensor faults are simulated to the nominal system model, and the designed observer is then to d
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18

ZHANG, XIAODONG. "FAULT DIAGNOSIS AND FAULT-TOLERANT CONTROL IN NONLINEAR SYSTEMS." University of Cincinnati / OhioLINK, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1021937028.

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19

Fernández, Mariano. "Failure detection and isolation in decentralised multisensor systems." Thesis, University of Oxford, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260155.

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20

Levesque, Mario J. L. "Fault detection and isolation for the Bluebird test bed aircraft." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1993. http://handle.dtic.mil/100.2/ADA277979.

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21

Meseguer, Amela Jordi. "Integration Techniques of Fault Detection and Isolation Using Interval Observers." Doctoral thesis, Universitat Politècnica de Catalunya, 2009. http://hdl.handle.net/10803/52812.

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An interval observer has been illustrated to be a suitable approach to detect and isolate faults affecting complex dynamical industrial systems. Concerning fault detection, interval observation is an appropriate passive robust strategy to generate an adaptive threshold to be used in residual evaluation when model uncertainty is located in parameters (interval model). In such approach, the observer gain is a key parameter since it determines the time evolution of the residual sensitivity to a fault and the minimum detectable fault. This thesis illustrates that the whole fault detection proce
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22

Lawesson, Dan. "Towards Behavioral Model Fault Isolation for Object Oriented Control Systems." Licentiate thesis, Linköping University, Linköping University, TCSLAB - Theoretical Computer Science Laboratory, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-5734.

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<p>We use a system model expressed in a subset of the Unified Modeling Language to perform fault isolation in large object oriented control systems. Due to the severity of the failures considered and the safety critical nature of the system we cannot perform fault isolation online. Thus, we perform post mortem fault isolation which has implications in terms of the information available; the temporal order in the error log can not be trusted. In our previous work we have used a structural model for fault isolation. In this thesis we provide a formal framework and a prototype implementation of a
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Zaidi, Syed Jamal Haider. "Fast fault isolation for embedded control system in vehicle networks /." Göteborg : Department of Applied Information Technology, IT University of Göteborg, Göteborg University and Chalmers University of Technology, 2006. http://www.ituniv.se/w/index.php?option=com_itu_thesis&Itemid=319.

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Lawesson, Dan. "Towards behavioral model fault isolation for object oriented control systems /." Linköping : Univ, 2000. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-5734.

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Hwas, Abdulhamed. "Model-based fault detection and isolation techniques for wind turbines." Thesis, University of Strathclyde, 2013. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=25512.

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The main objective of the work of this thesis is to design model-based fault detection and isolation techniques for a large-scale wind turbine. A mathematical model of the 5MW wind turbine was developed; the model was sufficiently detailed to be used for simulation purposes. The stages of the modelling procedure were to divide the overall wind turbine system into appropriate sub-models suitable for separate modelling. Each sub-model was then presented and combined in order to obtain a completed non-linear wind turbine model. Two methods are proposed to calculate the gains of a proportional-int
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Capitanu, Calin. "Fault Detection, Isolation and Recovery : Analysis of two scheduling algorithms." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-300128.

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Unmanned, as well as manned space missions have seen a high failure rate in the early era of space technology. However, this decreased a lot since technology advanced and engineers learnt from previous experiences and improved critical real time systems with fault detection mechanisms. Fault detection, isolation and recovery, nowadays, is generally available in every flying device. However, the cost of hardware can bottleneck the process of creating such a system that is both robust and responsive. This thesis analyses the possibility of implementing a fault detection, isolation and recovery s
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Krishnaswami, Vasanth. "Model based fault detection and isolation in nonlinear dynamic systems /." The Ohio State University, 1996. http://rave.ohiolink.edu/etdc/view?acc_num=osu148794218232319.

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Alrowaie, Feras A. "Fault isolation and alarm design in non-linear stochastic systems." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/52010.

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In this project, first we propose a novel model-based algorithm for fault detection and isolation (FDI) in stochastic non-linear systems. The algorithm is established based on parameter estimation by monitoring any changes in the behaviour of the process and identifying the faulty model using a bank of particle filters running in parallel with the process model. The particle filters are used to generate a sequence of hidden states, which are then used in a log-likelihood ratio to detect and isolate the faults. The newly developed scheme is demonstrated through implementation in two highly non-
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Jingjing, Hao. "Distributed sensor fault detection and isolation over wireless sensor network." Doctoral thesis, Universite Libre de Bruxelles, 2017. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/254423.

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Wireless sensor networks (WSNs) can provide new methods for information gathering for a variety of applications. In order to ensure the network quality of service, the quality of the measurements has to be guaranteed. Distributed fault detection and isolation schemes are preferred to centralized solutions to diagnose faulty sensors in WSNs. Indeed the first approach avoids the need for a central node that collects information from every sensor node, and hence it limits complexity and energy cost while improving reliability.In the case of state estimation over distributed architectures, the sen
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Meinguet, Fabien. "Fault-tolerant permanent-magnet synchronous machine drives: fault detection and isolation, control reconfiguration and design considerations." Doctoral thesis, Universite Libre de Bruxelles, 2012. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209757.

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The need for efficiency, reliability and continuous operation has lead over the years to the development of fault-tolerant electrical drives for various industrial purposes and for transport applications. Permanent-magnet synchronous machines have also been gaining interest due to their high torque-to-mass ratio and high efficiency, which make them a very good candidate to reduce the weight and volume of the equipment.<p><p>In this work, a multidisciplinary approach for the design of fault-tolerant permanent-magnet synchronous machine drives is presented. <p><p>The drive components are describ
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Tutivén, Gálvez Christian. "Fault detection and fault tolerant control in wind turbines." Doctoral thesis, Universitat Politècnica de Catalunya, 2018. http://hdl.handle.net/10803/663289.

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Renewable energy is an important sustainable energy in the world. Up to now, as an essential part of low emissions energy in a lot of countries, renewable energy has been important to the national energy security, and played a significant role in reducing carbon emissions. It comes from natural resources, such as wind, solar, rain, tides, biomass, and geothermal heat. Among them, wind energy is rapidly emerging as a low carbon, resource efficient, cost effective sustainable technology in the world. Due to the demand of higher power production installations with less environmental impacts, the
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Chakrabarti, Sudip. "Test generation for fault isolation in analog and mixed-mode circuits." Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/14899.

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Rattfält, Linda. "A comparative study of two structural methods for fault isolation analysis." Thesis, Linköping University, Department of Electrical Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2222.

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<p>Technical systems of today are often complex and integrated. If a fault occurs, the consequences can be disastrous both for the system itself and its surroundings. To maintain the operation and the security it is necessary to have a surveillance system which can detect a fault in an early stage.</p><p>In this thesis two structural methods for fault isolation analysis are discussed. The result from the studied algorithms shows what fault isolation properties a diagnostic model is expected to have. If the isolability is not good enough, it also gives information on where further modelling nee
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Mazars, Emmanuel Francis Marie. "Robust fault detection and isolation for linear time-invariant dynamic systems." Thesis, Imperial College London, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.437363.

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Widener, Christopher. "Fault isolation in power electronic based distribution systems without circuit breakers." Thesis, The Florida State University, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=1559659.

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<p> In the Future Renewable Electric Energy Distribution and Management (FREEDM) system, solid state Fault Isolation Devices (FIDs) are used to react to signals from a fault detection and location system to isolate faulted sections of a fault current limited power electronics based 12.47 kV distribution system. They accomplish this by interrupting fault currents, which in the FREEDM system are limited by Solid State Transformers (SST). However, as was expected, due to its silicon transistor technology, the developed FID prototype demonstrated rather high on-state losses during its operation. T
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Maleki, Sepehr. "A geometric approach to fault detection and isolation in multidimensional systems." Thesis, University of Southampton, 2015. https://eprints.soton.ac.uk/379271/.

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In this thesis the problem of fault detection and isolation for two subclasses of multidimensional systems, i.e., 3-D systems and repetitive processes is investigated by extending the geometric approach and notions of input containing conditioned invariants developed and introduced for standard 1-D linear systems to be applicable in multidimensional systems. The problem is investigated by designing an asymptotic observer that asymptotically reconstructs the system state. In case of a failure, the observer continues to reconstruct the state normally, however, the system produces a wrong state r
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Pernestål, Anna. "A Bayesian approach to fault isolation with application to diesel engine diagnosis." Licentiate thesis, KTH, School of Electrical Engineering (EES), 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4294.

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<p>Users of heavy trucks, as well as legislation, put increasing demands on heavy trucks. The vehicles should be more comfortable, reliable and safe. Furthermore, they should consume less fuel and be more environmentally friendly. For example, this means that faults that cause the emissions to increase must be detected early. To meet these requirements on comfort and performance, advanced sensor-based computer control-systems are used. However, the increased complexity makes the vehicles more difficult for the workshop mechanic to maintain and repair. A diagnosis system that detects and locali
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Selhammer, Anders. "Probabilistic Fault Isolation in Embedded Systems Using Prior Knowledge of the System." Thesis, KTH, Reglerteknik, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-105881.

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Nowadays truck engines are controlled by an embedded control system which is a specially designed computer system. It is important that the embedded system is robust against possible faults that could appear when driving the vehicle since faults may cause the vehicle to stop unintended or even worse, crash. To prevent this tests in the system are designed to detect faults and further isolate the faulty behaviors for components. After the isolation fault tolerant control software is used to control the engine in the presence of the faults until the faults have been attended to by a mechanic. In
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Pernestål, Anna. "A Bayesian approach to fault isolation with application to diesel engine diagnosis /." Stockholm : KTH School of Electrical Engineering, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4294.

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Mok, Hing-tung. "Online fault detection and isolation of nonlinear systems based on neurofuzzy networks." Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/hkuto/record/B39794064.

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Mok, Hing-tung, and 莫興東. "Online fault detection and isolation of nonlinear systems based on neurofuzzy networks." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B39794064.

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Patel, Vijaykumar Chhaganlal. "Modelling and intelligent fault detection and isolation of aero gas turbine engines." Thesis, University of Sheffield, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286615.

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Md, Kamal Mahanijah. "Intelligent fault detection and isolation for proton exchange membrane fuel cell systems." Thesis, Liverpool John Moores University, 2014. http://researchonline.ljmu.ac.uk/4574/.

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This work presents a new approach for detecting and isolating faults in nonlinear processes using independent neural network models. In this approach, an independent neural network is used to model the proton exchange membrane fuel cell nonlinear systems using a multi-input multi-output structure. This research proposed the use of radial basis function network and multilayer perceptron network to perform fault detection. After training, the neural network models can give accurate prediction of the system outputs, based on the system inputs. Using the residual generation concept developed in th
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Siegle, Felix. "Fault detection, isolation and recovery schemes for spaceborne reconfigurable FPGA-based systems." Thesis, University of Leicester, 2016. http://hdl.handle.net/2381/37521.

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This research contributes to a better understanding of how reconfigurable Field Programmable Gate Array (FPGA) devices can safely be used as part of satellite payload data processing systems that are exposed to the harsh radiation environment in space. Despite a growing number of publications about low-level mitigation techniques, only few studies are concerned with high-level Fault Detection, Isolation and Recovery (FDIR) methods, which are applied to FPGAs in a similar way as they are applied to other systems on board spacecraft. This PhD thesis contains several original contributions to kno
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Sonti, Niharika. "A Unified Method for Detecting and Isolating Process Faults and Sensor Faults in Nonlinear Systems." Wright State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=wright1292763603.

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Yu, Dingli. "Fault diagnosis for industrial systems with emphasis on bilinear systems." Thesis, Coventry University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364163.

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Hallgren, Dan, and Håkan Skog. "Distributed Fault Diagnosis for Networked Embedded Systems." Thesis, Linköping University, Department of Electrical Engineering, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-5229.

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<p>In a system like a Scania heavy duty truck, faultcodes (DTCs) are generated and stored locally in the ECUs when components, e.g. sensors or actuators, malfunction. Tests are run periodically to detect failure in the system. The test results are processed by the diagnostic system that tries to isolate the faulty components and set local faultcodes.</p><p>Currently, in a Scania truck, local diagnoses are only based on local diagnostic information, which the DTCs are based upon. The diagnosis statement can, however, be more complete if diagnoses from other ECUs are considered. Thus a system th
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Svärd, Carl. "Methods for Automated Design of Fault Detection and Isolation Systems with Automotive Applications." Doctoral thesis, Linköpings universitet, Fordonssystem, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-77073.

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Fault detection and isolation (FDI) is essential for dependability of complex technical systems. One important application area is automotive systems, where precise and robust FDI is necessary in order to maintain low exhaust emissions, high vehicle up-time, high vehicle safety, and efficent repair. To achieve good performance, and at the same time minimize the need for expensive redundant hardware, model-based FDI is necessary. A model-based FDI-system typically comprises fault detection by means of residual generation and residual evaluation, and finally fault isolation. The overall objectiv
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Schwarz, Thoralf A. "Uncertainty Analysis of a Fault Detection and Isolation Scheme for Multi-Agent Systems." Thesis, KTH, Reglerteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-104013.

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Diagnostic techniques in model-based fault detection and isolation approaches are often based on residuals. If the residuals become greater than a certain threshold then an alarm can be triggered. However, disturbances, such as those caused by model uncertainty, affect the behavior of the residuals and therefore the performance of the diagnostic system. Fault detection becomes a matter of security when applied in multi-agent systems, since their distributed nature offers adversaries possibilities to attack the system. This thesis considers disturbances caused by model uncertainty which is ofte
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Holmberg, Anders, and Per-Erik Eriksson. "Decision Support System for Fault Isolation of JAS 39 Gripen : Development and Implementation." Thesis, Linköping University, Department of Computer and Information Science, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-7021.

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Abstract:
<p>This thesis is a result of the increased requirements on availability and costs of the aircraft Jas 39 Gripen. The work has been to specify demands and to find methods suitable for development of a decision support system for the fault isolation of the aircraft. The work has also been to implement the chosen method. Two different methods are presented and a detailed comparison is performed with the demands as a starting point. The chosen method handle multiple faults in O(N2)-time where N is the number of components. The implementation shows how all demands are fulfilled and how new tests c
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