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Integrated design of feedback controllers and fault detectors

ANNUAL REVIEWS IN CONTROL 2009年第2期33卷 124-135页

作者： Ding, S. X. Univ Duisburg Essen Inst Automat Control & Complex Syst AKS D-47057 Duisburg Germany

This paper addresses the integrated design of controllers and fault detectors embedded in the feedback control loops. The state of the art of the integrated design technique is first reviewed. The focus of the review study is on the comparison between different design schemes and on the evaluation of the diagnostic performance. The second part of this paper consists of a study on controller configurations, observer-based residual generation and residual signals embedded in the feedback control loops. based on the observer and residual generator realization forms of the Youla controller parameterization, integrated design schemes for some practical control configurations are proposed and studied. (C) 2009 Elsevier Ltd. All rights reserved.

关键词： Control configurations fault diagnosis fault tolerant control structures Integrated design observer-based fault detection

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fault detection and estimation in systems with scarce measurement

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IFAC Proceedings Volumes 2009年第8期42卷 113-118页

作者： I. Peñarrocha R. Sanchis Departament d'Enginyeria de Sistemes Industrials i Disseny Universitat Jaume I de Castelló Spain

In this paper, the fault detection and estimation in discrete-time systems whose outputs are measured scarcely and irregularly with different sensors is addressed. An observer that estimates the states and the faults is used in which the updating gain depends on the sensors availability. The process is assumed to be affected by disturbances of known bounds, and the proposed approach allows to achieve a compromise between the time response of the fault detector and the disturbances attenuation (related to the faults detection threshold). Two strategies are proposed: in the first one, the threshold is fixed, and the response time is minimized. In the second one, the response time is fixed, and the threshold is minimized. In both cases, the observer design is based on H *infin; norms minimization via LMI.

关键词： fault detection and isolation observer-based fault detection Unknown input observer LMI Missing and scarce measurements Threshold False-alarm rate

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fault detection OF DESCRIPTOR SYSTEMS

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IFAC Proceedings Volumes 2006年第13期39卷 378-383页

作者： Ping Zhang Steven X. Ding Institute for Automatic Control and Complex Systems University of Duisburg-Essen 47057 Duisburg Germany

This paper is concerned with the fault detection problem of descriptor systems. First, an approach is proposed to design a normal observer based residual generator for descriptor systems by exploring the relationship between parity space based and observer based residual generators. It is then shown that the full decoupling problem can be easily solved with this approach. Finally, a model-free approach is given to directly identify parity space based or observer based residual generators from input and output data of descriptor systems and the order reduction of the identified residual generators is discussed.

关键词： fault detection Descriptor systems observer-based fault detection Parity space approach

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Survey of robust residual generation and evaluation methods in observer-based fault detection systems

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JOURNAL OF PROCESS CONTROL 1997年第6期7卷 403-424页

作者： Frank, PM Ding, X FB ELEKTROTECH FH LAUSITZD-01968 SENFTENBERGGERMANY

The paper outlines recent advances of the theory of observer-based fault diagnosis in dynamic systems towards the design of robust techniques of residual generation and residual evaluation. Emphasis will be placed upon the latest contributions using frequency domain techniques including H-infinity, theory, nonlinear unknown input observer theory, adaptive observer theory, artificial intelligence including fuzzy logic, knowledge-based techniques and the natural intelligence of the human operator. Two representative examples illustrate the efficiency of the observer-based approach. (C) 1997 Elsevier Science Ltd.

关键词： fault detection robustness unknown input observer nonlinear observer adaptive observer observer-based fault detection fuzzy logic

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ENHANCEMENT OF ROBUSTNESS IN observer-based fault-detection

ENHANCEMENT OF ROBUSTNESS IN OBSERVER-BASED FAULT-DETECTION

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SYMP ON fault detection, SUPERVISION AND SAFETY FOR TECHNICAL PROCESS ( SAFEPROCESS 91 )

作者： FRANK, PM Universitaet-GH-Duisburg Duisburg Germany

ISBN: (纸本)0080412750

A prerequisite for the feasibility of the technique of observer-based fault detection and isolation (FDI) in dynamic systems is a satisfactory robustness with respect to modeling uncertainties. This paper surveys the most relevant methods to increase the robustness in both the stage of residual generation and residual evaluation. Among them are the generalized observer scheme, the robust parity space check, the unknown input and H∞ observer scheme, the decorrelation filter, and the concept of adaptive threshold selection. It is pointed out that the unknown input and H∞ observer concept that provides perfect decoupling from the modeling errors, or its optimal approximation constitutes a general framework of robust residual generation that generalizes and unifies numerous other approaches, among them the parity space and detection filter approach. It is further shown that this FDI method can even be applied to a certain class of nonlinear systems.

关键词： fault DIAGNOSIS fault detection ANALYTICAL REDUNDANCY MODEL-based fault detection observer-based fault detection ROBUST observer-based fault detection UNKNOWN INPUT observer SCHEME

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fault detection-Location in Robots Using a Scheme of observers

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IFAC Proceedings Volumes 1994年第5期27卷 323-328页

作者： F. Noureddine M.S. Lazeregue D. Noyes Ecole Nationale d’ingénieurs de Tarbes BP 1629 65016 Tarbes Cédex FRANCE

To implement fault tolerance techniques on robot architecture, a scheme of fault detection-location has been developped. This scheme corresponds to a combination of asymptotic, unknown inputs and dedicated observers w... 详细信息

关键词： fault tolerance techniques observer-based fault detection fault-location robotics Luenberger observer dedicated observers unknown input observers

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Enhancement of Robustness in observer-based fault detection

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IFAC Proceedings Volumes 1991年第6期24卷 99-111页

作者： P.M. Frank Universitaet-GH-Duisburg Fachgebe it Mess- und Regelungstechnik Bismarckstrasse 81 D-4100 Duisburg 1 Germany

A prerequisite for the feasibility of the technique of observer-based fault detection and isolation (FDI) in dynamic systems is a satisfactory robustness with respect to modeling uncertainties. This paper surveys the most relevant methods to increase the robustness in both the stage of residual generation and residual evaluation. Among them are the generalized observer scheme, the robust parity space check, the unknown input and observer scheme, the decorrelation filter, and the concept of adaptive threshold selection. It is pointed out that the unknown input and H ∞ observer concept that provides perfect decoupling from the modeling errors, or its optimal approximation constitutes a general framework of robust residual generation that generalizes and unifies numerous other approaches, among them the parity space and detection filter approach. It is further shown that this FDI method can even be applied to a certain class of nonlinear systems.

关键词： fault diagnosis fault detection analytical redundancy model-based fault detection observer-based fault detection robust observer-based fault detection unknown input observer scheme

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ROBUST MODEL-based fault-detection IN DYNAMIC-SYSTEMS

ROBUST MODEL-BASED FAULT-DETECTION IN DYNAMIC-SYSTEMS

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SYMP ON ON-LINE fault detection AND SUPERVISION IN THE CHEMICAL PROCESS INDUSTRIES

作者： FRANK, PM

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Principles of Model-based fault detection

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IFAC Proceedings Volumes 1992年第10期25卷 213-220页

作者： P.M. Frank Fachgebiet Mess- und Regelungstechnik Universität-GH-Duisburg Bismarckstr 81 4100 Duisburg Germany

The paper outlines the principles of fault detection and isolation (FDI) in dynamic systems using a mathematical model of the system. Implemented on a digital computer, these model-based algorithms can efficiently be applied to signal validation, on-line detection of abrupt faults and early fault diagnosis in a long-term system supervision. The basic concept of the model-based approach to fault detection and isolation is described, and the different methods of residual generation developed in the past two decades are reviewed. Among the methods considered are the parameter identification approach, the different observer-based concepts, the parity space approach and the knowledge-based strategy. It is also shown how structured residuals for the localization of the faults can be generated with the aid of observer schemes. As an issue of great practical relevance the robustness with respect to modeling errors is taken into consideration. Here emphasis is placed upon the unknown input observer approach and its application to instrument, actuator and component fault detection.

关键词： fault detection diagnosis model-based fault detection analytical redundancy observer-based fault detection robustness

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Principles of model-based fault detection

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Annual Review in Automatic Programming 1992年 17卷 213-220页

作者： P.M. Frank Fachgebiet Mess- und Regelungstechnik Universität-GH-Duisburg Bismarckstr. 81 4100 Duisburg Germany

The paper outlines the principles of fault detection and isolation (PDI) in dynamic systems using a mathematical model of the system. Implemented on a digital computer, these model-based algorithms can efficiently be applied to signal validation, on-line detection of abrupt faults and early fault diagnosis in a long-term system supervision. The basic concept of the model-based approach to fault detection and isolation is described, and the different methods of residual generation developed in the past two decades are reviewed. Among the methods considered are the parameter identification approach, the different observer-based concepts, the parity space approach and the knowledge-based strategy. It is also shown how structured residuals for the localization of the faults can be generated with the aid of observer schemes. As an issue of great practical relevance the robustness with respect to modeling errors is taken into consideration. Here emphasis is placed upon the unknown input observer approach and its application to instrument, actuator and component fault detection.

关键词： fault detection diagnosis model-based fault detection analytical redundancy observer-based fault detection robustness

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