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10th International Conference on Control, Automation, Robotics and Vision

作者： Yagoubi, Mohamed Chevrel, Philippe Bouali, Anis IRCCyN Commun & Cybernet Res Inst Nantes France Ecole Mines Nantes Dept Automat Control Nantes France

ISBN: (纸本)9781424422869

New methods for obtaining observer-based forms of descriptor controllers are presented in this paper. The derived controller is input-output equivalent to the initial controller with a separated estimation/control structure. The general form includes a static control and estimation gains with or without an extra descriptor Youla parameter. A numerical example demonstrates the effectiveness of the proposed techniques.

关键词： observer-based controller descriptor systems Youla parametrization

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On the Design of an observer-based controller for Linear Systems with Unknown Delay

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IFAC Proceedings Volumes 2004年第21期37卷 109-114页

作者： Alif Adil Boutayeb Mohamed Darouach Mohamed CRAN-CNRS-UMR 7039 IUT de Longwy University Henri Poincaré-NancyI 186 rue de Lorraine 54400 Cosnes et Romain France LSIIT-CNRS-UMR 7005 University of Louis Pasteur Strasbourg Pole API Bu.S.Braut 67400 ILLKIRCH France

In this paper, we present two alternative observer-based H ∞ , control design methods for linear dynamic systems with unknown delay, the later is assumed to evolve in a pre-specified interval. based on the Lyapunov-Krasovskii functional and some algebraic manipulations, we design observer-based control laws that guarantee the asymptotic stability of the closed-loop control system and the estimation errors. The obtained results are given in terms of linear matrix inequalities. The theoretical claims and the methods reliability are clearly illustrated via two simple examples.

关键词： Time-delay systems observer-based controller Unknown delay linear matrix inequality

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Is a mixed design of observer-controllers for time-delay systems interesting?

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ASIAN JOURNAL OF CONTROL 2007年第2期9卷 180-189页

作者： Sename, O. CNRS Lab Automat Grenoble INPG UMR5528ENSIEG F-38402 St Martin Dheres France

This paper deals with H-infinity observer-based feedback control for linear time-delay systems, in the framework of delay independent stability. We will propose a new LMI solution to observer-controller design that ensures a disturbance attenuation level for the controlled output as well as for the state estimation error, which is an open problem. This will be compared with a well-known solution and with a usual strategy in control which consists in designing the observer and the controller separately. Our aim is to try to bring a positive answer to the following question: is there an interest to solve the problem in a single (unique) formulation or should we design separately the observer and the controller? An application to a wind tunnel model is provided to emphasize the interest of the given results, particularly in comparison with existing results on H-infinity observer-based control.

关键词： time-delay H-(infinity) observer-based controller LMI

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Delay-dependent dynamical H^∞ control of linear state-delayed systems

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26th Chinese Control Conference

作者： Wang Dejin Tianjin Univ Sci & Technol Sch Elect Informat & Automat Tianjin 300222 Peoples R China

ISBN: (纸本)9787811240559

This paper provides a linear matrix inequality (LMI) approach to delay-dependent observer-based stabilizing and H-infinity controller design for linear state-delayed systems. The resulted delay-dependent criteria for the existence of controllers are presented by two independent LMIs via constructing a proper Lyapunov functional. The benefits of the proposed method lie in: (1) The feedback-gain and the observer-gain can be computed simultaneously;(2) The delay-bound or the H-infinity performance bound can be optimized;(3) The result obtained is less conservative than the previous work existing in the literature. A numerical example illustrates the potentiality of our claim.

关键词： time-delay systems delay-dependent criteria observer-based controller H-infinity controller LMI

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An iterative method for output feedback mixed H₂/H_∞ control problem

An iterative method for output feedback mixed H2...

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Annual Conference on the Society-of-Instrument-and-Control-Engineers

作者： Kami, Yasushi Nobuyama, Eitaku Akashi Natl Coll Technol Dept Elect & Comp Engn Hyogo Japan Kyushu Inst Technol Dept Syst Innovat & Informat Fukuoka Japan

ISBN: (纸本)9784907764289

This paper treats the output feedback H-2 control with H-infinity norm constraint (mixed H-2/H-infinity control problem). In general, this problem is a BMI problem which is difficult to be solved theoretically. The purpose of this paper is to propose an iterative method for obtaining a sub-optimal solution of the mixed H-2/H (infinity) control problem. The key idea of this paper is to employ a full-order observer-based controller. The proposed method produces a sequence of controllers which approaches to the unconstrained globally optimal H-2 controller while it satisfies the H-infinity norm constraint. A numerical example shows the effectiveness of our method.

关键词： mixed H-2/H-infinity control output-feedback observer-based controller iterative algorithm

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A fuzzy approach for sensor fault-tolerant control of vehicle lateral dynamics

A fuzzy approach for sensor fault-tolerant control of vehicl...

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IEEE Conference on Control Applications

作者： Oudghiri, Mohammed Chadli, Mohammed El Hajjaji, Ahmed Ctr Robot Eletrotech & Automat EA 3299 F-80000 Amiens France

ISBN: (纸本)9781424404421

This paper presents Fault-Tolerant Control (FTC) architecture for vehicle lateral dynamics described by Takagi-Sugeno (TS) fuzzy model with parametric uncertainties and sensor faults. Using the LMI formulation, the T-S uncertain fuzzy model of vehicle dynamics is used to design an output feedback observer-based controller, a method based on observer bank is then investigated for detection, isolation and accommodation of sensor faults. Simulations show that the sensor faults are detected immediately after their occurrences and illustrate the proposed FTC strategy.

关键词： vehicle lateral dynamics Takagi-Sugeno fuzzy model observer-based controller fault-tolerant control LMI

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Iterative method for designing an observer-based mixed H₂/D-stability controller

Iterative method for designing an observer-based mixed H<...

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SICE-ICASE International Joint Conference

作者： Kami, Yasushi Nobuyama, Eitaku Department of Electrical and Computer Engineering Akashi National College of Technology Hyogo Japan Department of Systems Innovation and Informatics Kyushu Institute of Technology Fukuoka Japan

ISBN: (纸本)9788995003848

This paper treats the output feedback H-2 control with regional pole placement condition. In general, this problem is a BMI problem which is difficult to be solved theoretically. The purpose of this paper is to propose an iterative method for obtaining a sub-optimal solution of the H-2 control problem with regional pole placement condition. The key idea of this paper is to employ a full-order observer-based controller. The proposed method produces a sequence of controllers which approaches to the unconstrained globally optimal H-2 controller while it satisfies the D-stability constraint. A numerical example shows the effectiveness of our method.

关键词： mixed H-2/D-stability control observer-based controller iterative algorithm separation principle

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observer-based H ∞ CONTROL FOR TIME-DELAY SYSTEMS : A NEW LMI SOLUTION

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IFAC Proceedings Volumes 2006年第10期39卷 114-119页

作者： O. Sename C. Briat Laboratoire d'Automatique de Grenoble UMR CNRS-INPG-UJF 5528 ENSIEG-BP 46 38402 Saint Martin d'Hères Cedex FRANCE Fax :+33 4 76 92 63 88

We propose here a new LMI solution to H ∞ observer-controller design that ensures a disturbance attenuation level for the controlled output and for the state estimation error, which is an open problem. This will be c... 详细信息

关键词： Time-delay delay-independent H ∞ observer-based controller LMI

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Delay-dependent observer-based stabilizing controller design for linear multiple state-delayed systems

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控制理论与应用（英文版） 2003年第1期1卷 101-104页

作者： Dejin WANG(Institute of Electronic Engineering, Heilongjiang University, Harbin Heilongjiang 150080, China) Institute of Electronic Engineering Heilongjiang University Harbin Heilongjiang China

This article concerns a coupled LMIs approach to delay-dependent observer-based output feedback stabilizing controller design for linear continuous-time systems with multiple state delays. The advantage of our proposed delay-dependent coupled LMIs criterion lies in that: ( 1 ) it can optimize one of multiple time delays with others selected properly, and at the same time, the feedback-gain and observer-gain can be obtained, respectively. (2) it is less conservative than the existing delay-independent ones in the literature. Algorithm to solve the coupled LMIs is also given. Numerical examples illustrate the effectiveness of our method. Keywords Delay-dependent criterion - Time-delay system - Multiple time-delay - observer-based controller - Linear matrixinequality (LMI)

关键词： Delay-dependent criterion Time-delay system Multiple time-delay observer-based controller Linear matrixinequality (LMI)

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Multi-objective H₂/H_∞-optimal control via finite dimensional Q-parameterization and its applications

Multi-objective H2/H∞-optimal control...

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IEEE International Conference on Mechatronics Automation

作者： Cao, Jun Liu, Yaqiu Sun, Liping NE Forestry Univ Sch Electromech Engn Harbin Heilongjiang Pr Peoples R China

ISBN: (纸本)078039044X

The problem of multi-objective H2/H infinity optimal controller design is reviewed. A necessary condition is given to consummate the algorithm for the existence of a solution of the generalized non-symmetric and rectangular Riccatti equation. In view of the observer-based structure form of controller involving Youla parameter, the problem can be transformed into the tractable and practical LMI formulation of the multi-objective control problem through linearizing change of variables. In order to reduce the conservatism of the system, independent Lyapunov functions are used for each synthesis objective. Illustrative application to Benchmark problem is given to demonstrate the useful and practicality of the approach.

关键词： robust control multi-objective synthesis LMI optimization Youla parameterization observer-based controller

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