Fault tolerant control phd thesis proposal overview theres growing concern that transient problems, brought on by cosmic sun rays along with other factors, will occur frequently later on highperformance processors, as designers push technology to the extreme limits. Element faults affect the maximum capability of the overall actuator, but through control techniques, the required performance can be maintained. Jasim, omar 2010 an extended induction motor model for. In seeking to arrive at these demonstrations, this thesis makes advances in the areas of modelbased fault diagnosis and faulttolerant control. This performance degradation is mainly due to high traffic rerouting creating bottlenecks or cluster isolation. Thesis, department of electrical engineering, princeton university, june 2008. Evolutionary algorithms for practical sensor fault.
Motivation ftcgeneralities control reference governor recon. Fault tolerant emerging onchip interconnects for manycore. Modelling, simulation and implementation of a fault tolerant. This thesis presents several faultfailuretolerant switching control system. It makes an interesting case study, since the pilots were able to keep the aircraft in the air for a full 10 minutes before the crash, which is a reasonable amount of time for an online fault tolerant system to take effect. Disc is a prestigious international forum on the theory, design, analysis, implementation, and application of distributed systems and networks. This thesis focuses on the application of frugally designed fault tolerant control systems ftcs with automatic actuator and sensor faults containment capabilities on distillation processes, particularly atmospheric crude distillation unit. In order to complete a mission efficiently and with a high. Buckley, gary 2017 fault detection and tolerance of. Fast, accurate state measurement in superconducting qubits daniel sank 2014. Faulttolerant vision for vehicle guidance in agriculture. This thesis takes another look at several aspects of stabilizer code quantum errorcorrection to discover solutions to the practical problems of choosing a code, using it to correct errors, and performing faulttolerant operations. Application of fault tolerant techniques to a real time control system. Evolutionary algorithms for practical sensor fault tolerant.
Thus, fault detection and isolation fdi and fault tolerant control. A fault tolerant micoarchitecure for safetyrelated. Multiplemodel based diagnosis for adaptive faulttolerant control. This thesis investigates wind turbine reliability improvement, utilizing modelbased fault tolerant control, so that the wind turbine continues to operate satisfactorily with the same performance index in the presence of faults as in fault free situations. The selection of an optimum fault tolerant electric drive for each actuator is discussed and fault tolerant control schemes are presented. Fault tolerant flight control system design for unmanned. A control system is faulttolerant if it possesses the capability of optimizing the system stability and admissible performance subject to bounded faults, complexity and modeling uncertainty.
Faulttolerant vision for vehicle guidance in agriculture morten rufus blas kongens lyngby 2010 dtu elektrophd. This phd work is motivated by this fact and a modelbased fault diagnosis and ftc scheme is developed for a doubly fed induction generator dfig based wind turbine system. My phd study was a long journey and i had spent the first half of it under the. This paper puts forward a modelbased sensor faulttolerant control design framework for multiinput and multioutput systems. Fault tolerant control based on settheoretic methods phd. This thesis describes a new replication algorithm, bft, that can be used to build highlyavailable systems that tolerate byzantine faults. This involves sensor based closed loop vector control for a healthy im, variable frequency with constant fluxvf closed loop for both stator open winding and stator short winding faults, vf open loop to control the drive in case of minimum voltage fault and using the. Uas using only one aerodynamic control surface and the throttle. The approach that we took in this case is not surprisingly based on modelpredictive control. Fault tolerant control phd thesis writing i help to study.
In the original, the aim is to guide, by hand, a wire loop along a wire which has been bent to form a meandering track, without touching the loop to the wire. Fault diagnosis and fault tolerant control of dfig based. Application of fault tolerant techniques to a real time. Phd student in the fault tolerance area at chalmers university, for the technical support, helping with the report, giving continuous feedback and. Research to date has concentrated on hras based on electromechanical technology, of relatively low order, controlled through passive fault tolerant control ftc methods. A sample code of a pid control algorithm is depicted bellow osman. We show that mac protocols and topology planning algorithms can be designed together to create fault tolerant wsns for volatile environments. Manuel at the time was working on his own phd thesis and the idea for my final. Flatness property affords analytical redundancy and permit to compute the states and control inputs of the system. Since the conventional control methodologies are not adequate to accommodate such failures, fault tolerant control ftc is required for safety critical system. Further on, in active control systems for railway vehicles the actuators tend to be significantly more expensive and require more additional space than sensors, and an electronic control unit. Faulttolerant flight control using one aerodynamic control. The practical results showed that sensor fault tolerant control was successfully achieved. Faulttolerant control merges where several disciplines and systemtheoretic.
Hra configurations of higher order, formed from electromagnetic actuators are considered. This chapter gives an overview of the available methods for dealing with faults in sensors, actuators and within the controlled system. Advances in gainscheduling and fault tolerant control. Fault detection and tolerance of electrical machines in automotive applications by gary buckley submitted to the university of nottingham for the degree of doctor of philosophy 2017. Modelling, simulation and implementation of a fault. The objective of this thesis is to expand upon this work.
Practical byzantine fault tolerance by miguel castro. Pdf diagnostic and faulttolerant control applied to an. We show that mac protocols and topology planning algorithms can be designed together to create faulttolerant wsns for volatile environments. Faulttolerant control of continuousvariable systems. Yu, bin 2016 fault tolerant control with applications to aircraft using linear quadratic design framework. Having a reliable fault diagnosis and fault tolerant control ftc scheme is crucial to improve the reliability of wind turbines and reduce expensive repair cost. This paper focus on recent results in overall design methods for fault tolerant control systems. M 2015, fault tolerant strategy for actively controlled railway wheelset, phd thesis, salford. Therefore, developing an analytical redundancybased fault tolerance technique for an actively controlled wheelset that minimises the number of actuators. Sensor faults compensation for mimo faulttolerant control. The key challenges in creating the virtual environment to train for generic sensor fault tolerant algorithms are considered and addressed. A fault tolerant micoarchitecure for safetyrelated automotive control this item was submitted to loughborough universitys institutional repository by thean author. In this thesis work, a novel algorithmic fault tolerant control system architecture.
In this thesis both passive and active approaches to faulttolerant control ftc are developed. Our first result looks at limitations on the simplest implementation of faulttolerant operations, transversality. Abstract the report describes a research investigation into fault tolerant strategies within a real time control system. Sliding mode fault tolerant reconfigurable control against. This thesis investigated the dual motor module fault tolerant drive system in which two motor modules were connected. Although a single motor module fault tolerant drive may be sufficient in some applications, this motor drive only offers limited redundancy. The passive ftc methods are based on robust controller design methods. This thesis aims to develop an effective ftc system to improve the security, reliability. The shaky hand is a multiinput, multioutput laboratory demonstrator which is modelled on a village fete game. Transparent fault tolerance for scalable functional computation in the journal of functional programming details. Linear and nonlinear techniques for modeling, fault diagnosis, faulttolerant control, path and trajectory planningre.
Fault diagnosis and fault tolerant control of dfig based wind. Faulttolerant typed assembly language acm dl, pdf frances perry, lester mackey, george a. Pdf concepts and methods in faulttolerant control mogens. Design and implementation of a faulttolerant driveby. Nevertheless, the requirements from the use in fault tolerant architectures have caused new challenges and further development.
It is shown that transputer hardware can be used in designing a suitable optimal controller for general nonlinear timevarying aircraft. Diagnostic and faulttolerant control applied to an unmanned aerial vehicle phd thesis presentation presentation pdf available december 2016 with 395 reads how we measure reads. The invariance property and unique synthesization procedure of sliding mode control smc make it one of the most competitive candidates for ftc. Wind turbine reliability improvement by fault tolerant control. Fault detection theory has been the subject of intensive study for two decades. Faulttolerant superconducting qubits julian kelly 2015. Our research group organized the international symposium on distributed computing disc conference held in budapest between the 14 th and 18 th of october 2019. This is done through developing a new adaptive voltage balancing strategy based on capacitor voltage estimation utilizing adaptive linear neuron adaline and recursive least squares rls algorithms. The fault tolerant supervisory control systems are feedback control systems with the property of tolerance to faults, or even failures, in sensors, actuators or process. Submitted in partial ful lment of the requirements for the award of doctor of philosophy of loughborough universit. This paper presents a fault tolerant control approach for nonlinear flat systems. Ucc library and ucc researchers have made this item openly. This thesis introduces a fault tolerant control system for controlling the mmc in normal as well as abnormal operating conditions.
Fault tolerant control systems a development method and reallife case study. Faulttolerance can be enabled in a number of di erent areas of wsn design and operation, including the medium access control mac layer and the initial topology design. In the original game, touching the handheld loop against the wire track sets off a loud warning bell and the player loses. This thesis addresses this issue with the design of two fault tolerant nonlinear structured adaptive model inversion control schemes for systems with. In the first part of the thesis, nonlinearties and time varying aspects of the aircraft system, together with the current available. The evolved algorithms are analysed and then verified using the demonstrator in practice. Fault tolerant control phd thesis proposal i help to study. Yu, bin 2016 faulttolerant control with applications to aircraft using linear quadratic design framework. Fault tolerant strategy for actively controlled railway. Fault tolerant motor drives are becoming more important in safety critical applications. Fault tolerant control does not yet comprise a unique theoretic framework but employs specific ideas to treat the different problems.
The high redundancy actuator hra project investigates a novel approach to fault tolerant actuation, which uses a high number of small actuation elements, assembled in series and parallel in order to form a single intrinsically fault tolerant actuator. Diagnostic and faulttolerant control applied to an unmanned aerial vehicle find, read and cite all the research you. Computing prime factors using a josephson phasequbit architecture. In this dissertation new modeling and fault tolerant control methodologies of a quadcopter with x8 con. Fault diagnosis and fault tolerant control of complex. The development of the electric flap and nose wheel steering systems is described, with the focus on the work performed by the author, primarily on the power electronic converters and control software. This framework facilitates the use of fault indicating residuals to compensate for faulty sensor feedback signals and allows the integrated design of a faulttolerant control system to be achieved with established robust h methods. Parallel processing for fault tolerant aircraft control. Faulttolerant control merges several disciplines to achieve this goal, including online fault diagnosis, automatic. Describes potential faulttolerant control ftc strategies for gainscheduled systems. Fault tolerant control based on settheoretic methods.
Operational failure of control surfaces is one of the main reasons leading to aircraft crash. This paper focus on recent results in overall design methods for. It makes an interesting case study, since the pilots were able to keep the aircraft in the air for a full 10 minutes before the crash, which is a reasonable amount of time for an online faulttolerant system to take effect. Nevertheless, the requirements from the use in faulttolerant architectures have caused new challenges and further development. Unmanned aerial vehicles uavs offer an incomparable means of gathering intelligence and carrying out missions without needing an onboard human pilot. It would be impossible to accomplish my phd study without them. This thesis presents the design and implementation of a prototype for a drivebywire. An extended induction motor model for investigation of faulted machines and fault tolerant variable speed drives by omar fadhel jasim b. Thesis submitted to the university of nottingham for the degree of doctor of philosophy october 2009. This thesis takes another look at several aspects of stabilizer code quantum errorcorrection to discover solutions to the practical problems of choosing a code, using it to correct errors, and performing fault tolerant operations. Fault tolerant control of spacecraft digital library.
This thesis addresses the problem of realtime optimal control of aircraft systems using parallel processing techniques. Fault tolerant control of large flexible space structures. Pdf fault tolerant control with pids for a gas turbine. Observerbased robust fault estimation for faulttolerant control. Faulttolerant control with applications to aircraft using linear. The benefits are considerable in terms of cost, efficiency, and reduced pilot risk. Fault tolerant systems research group department of. Thus the emphasis of this research is to develop a faulttolerant system of active control for a railway vehicle in the event of actuator malfunction in order to guarantee stability and good curving performance without using additional actuators. This thesis attempts to apply a probabilistic model, namely a gaussian process, in a model predictive control framework for fault tolerant control, with the aim of more.
For the design of fault tolerant control systems the hybrid nature is usually neglected and the focus lies with fault detector design and selection of remedial action. Recancentrate, a faulttolerant network architecture for controller area network. Fault diagnosis, faulttolerant control, and cooperative. Fault tolerant control phd thesis writing overview theres growing concern that transient problems, brought on by cosmic sun rays along with other factors, will occur frequently later on highperformance processors, as designers push technology to the extreme limits. This thesis aims at exploring the fault tolerant control of the ims. In seeking to arrive at these demonstrations, this thesis makes advances in the areas of modelbased fault diagnosis and fault tolerant control. Faulttolerant control with applications to aircraft using. Fault tolerance can be enabled in a number of di erent areas of wsn design and operation, including the medium access control mac layer and the initial topology design. Faulttolerant flight control using one aerodynamic. The aim of this thesis is to integrate fault tolerance mechanisms to ensure the overall performance of the noc. Fault tolerant flight control system design for unmanned aerial vehicles a thesis submitted in ful lment of the requirements for the degree of doctor of philosophy rudaba khan bachelor of engineering aerospace, rmit university bachelor of applied science aviation, rmit university bachelor of applied science mathematical sciences, rmit. Observerbased robust fault estimation for faulttolerant. An application of the fully connected cascade neural network by saed hussain a thesis submitted in partial ful lment for the requirements for the degree of doctor of philosophy at the university of central lancashire.
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