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作者： Aßfalg, Jochen Allgöower, Frank Research, Corporate Sector engineering, Advance Corporate Sector Research and Advance Engineering Mechatronic Engineering Robert Bosch GmbH 70442 Stuttgart Germany Institute for Systems Theory and Automatic Control University of Stuttgart 70550 Stuttgart Germany

ISBN: (纸本)9783902661142

This paper considers the single- and multiple-fault diagnosis of constrained and nonlinear systems. In order to describe the system dynamics in fault-free and in faulty operation, a structured augmented state form is introduced. Fault characteristics are considered to be generated by dynamical exosystems that are switched via equality constraints to overcome the augmented state observability limiting the number of diagnosable faults. Based on the proposed model, the fault diagnosis problem is specified as an optimal hybrid (augmented) state estimation problem. Sub-optimal solutions are discussed and an approximate estimation scheme which allows for incorporating constraints is provided. As outlined by simulation, the suggested approach enables to detect, isolate, and identify faults and promises a powerful solution for a large class of fault diagnosis problems. Copyright © 2006 IFAC.

关键词： Nonlinear systems

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Unified parametric approaches for high-order integral observer design for matrix second-order linear systems

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控制理论与应用（英文版） 2006年第2期4卷 133-139页

作者： Guangren DUAN Yunli WU Center for Control Theory and Guidance Technology Harbin Institute of Technology Harbin Heilongjiang 150001 China Beijing Institute of Control and Engineering Beijing 100080 China

A type of high-order integral observers for matrix second-order linear systems is proposed on the basis of generalized eigenstructure assignment via unified parametric approaches. Through establishing two general parametric solutions to this type of generalized matrix second-order Sylvester matrix equations, two unified complete parametric methods for the proposed observer design problem are presented. Both methods give simple complete parametric expressions for the observer gain matrices. The first one mainly depends on a series of singular value decompositions, and is thus numerically simple and reliable; the second one utilizes the fight factorization of the system, and allows eigenvalues of the error system to be set undetermined and sought via certain optimization procedures. A spring-mass-dashpot system is utilized to illustrate the design procedure and show the effect of the proposed approach.

关键词： Matrix second-order linear systems High-order integral observer Generalized eigenstructure assignment Singular value decomposition Right factorization

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Eigenstructure assignment in a class of second-order dynamic systems

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控制理论与应用（英文版） 2006年第3期4卷 302-308页

作者： Guosheng WANG Qiang LV Guangren DUAN Department of Control Engineering Academy of Armored Force Engineering Beijing 100072 China Center for Control Theory and Guidance Technology Harbin Institute of Technology Harbin Heilongjiang 150001 China

Eigenstructure assignment using the proportional-plus-derivative feedback controller in a class of secondorder dynamic system is investigated. Simple, general, complete parametric expressions for both the closed-loop eigenvector matrix and the feedback gains are established based on two simple Smith form reductions. The approach utilizes directly the original system data and involves manipulations only on n-dimensional matrices. Furthermore, it reveals all the degrees of freedom which can be further utilized to achieve additional system specifications. An example shows the effect of the proposed approach.

关键词： Second-order dynamic systems Eigenstructure assignment Proportional-plus-derivative control Parametric solutions

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On complexity issues in multiobjective controller design using convex optimization

On complexity issues in multiobjective controller design usi...

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作者： Rieber, Jochen M. Scherer, Carsten W. Allgöwer, Frank Institute for Systems Theory in Engineering University of Stuttgart Pfaffenwaldring 9 70550 Stuttgart Germany Delft Center for Systems and Control Delft University of Technology Mekelweg 2 2628CD Delft Netherlands

ISBN: (纸本)9783902661104

In multiobjective control of linear systems, critical issues are the size of optimization constraints, number of variables, and computation time. This paper investigates in a quantitative way, how some prominent methods from the literature behave with respect to these critical factors for different problem sizes. Moreover, an alternative formulation is proposed and compared to the existing approaches, showing its favorable properties for a selection of typical applications.

关键词： Convex optimization

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Parameterization of High Order PI Observers for Second-order Linear Systems

Parameterization of High Order PI Observers for Second-order...

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Chinese control Conference (CCC)

作者： Guosheng Wang Bing Liang Guangren Duan Department of Control Engineering Academy of Armored Forces Engineering Beijing China Center for Control Theory and Guidance Technology Harbin Institute of Technology Harbin China

The design of high-order proportional plus integral (PI) observers in second-order linear systems is investigated. Based on the solutions to a so-called generalized Sylvester equation, a parametric method to solve this design problem is proposed. This method presents the parametric expressions for the gain matrices and the left eigenvector matrix of the high-order PI observers. These parameters included in this method offer all the design degrees of freedom, which can be further utilized to satisfy certain specified performances, such as disturbance decoupling, LTR and robustness. In addition, this method utilizes directly the original system data and involves manipulations only on n-dimensional matrices. An illustrative example shows the effect and simpleness of the proposed method.

关键词： Linear systems control engineering control theory Integral equations Robustness

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Design of Robust Tracking Observer for Perturbed control Systems

Design of Robust Tracking Observer for Perturbed Control Sys...

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World Congress on Intelligent control and Automation (WCICA)

作者： Guosheng Wang Qiang Lv Bing Liang Guangren Duan Department of Control Engineering Academy of Armored Forces Engineering Beijing China Center for Control Theory and Guidance Technology Harbin Institute of Technology Harbin China

The design of robust tracking observer for a class of perturbed linear control systems is investigated in this paper. Based on the parametric solutions to a Sylvester matrix equation, the robust index and the matrices of tracking observer are parameterized and the problem of designing robust tracking observer is changed in to a minimization problem. A simple and effective algorithm for the design of tracking observer is proposed. An illustrative example and its simulation results show the simpleness and effectiveness of the proposed algorithm

关键词： Robust control control systems Robustness Vectors Force control Equations Linear systems control engineering control theory Design engineering

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Anti-synchronization chaos shift keying method based on generalized lorenz system

Anti-synchronization chaos shift keying method based on gene...

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作者： Čelikovský, Sergej Lynnyk, Volodymyr Šebek, Michael Institute of Information Theory and Automation Academy of Sciences of the Czech Republic P.O. Box 18 182 08 Prague 8 Czech Republic Department of Control Engineering Faculty of Electrical Engineering Czech Technical University In Prague Czech Republic

ISBN: (纸本)9783902661098

In this paper, a modified version of the Chaos Shift Keying (CSK) scheme for secure encryption and decryption of data is proposed. The proposed scheme uses the effect of anti-synchronization, rather than synchronization. More specifically, the classical CSK method determines the correct value of binary signal through checking which unsynchronized system is getting synchronized. On the contrary, our novel method determines wrong value of binary signal through checking which already synchronized system is loosing synchronization. The advantage of the proposed method is two-fold. First, it requires very reasonable amount of data to encrypt and time to decrypt a single bit. Secondly, its security can be investigated and estimated as practically unbreakable. The main reason for both advantages is that anti-synchronization is thousand times faster than synchronization, even when using two close each to other chaotic systems. Our method is implemented and thoroughly tested on the recently introduced generalized Lorenz system (GLS) family making advantage of its special parametrization. Copyright © 2006 IFAC.

关键词： Synchronization

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Nonlinear model predictive control of a turbocharged diesel engine

Nonlinear model predictive control of a turbocharged diesel ...

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IEEE International Conference on Computer-Aided Design

作者： Martin Herceg Tobias Raff Rolf Findeisen Frank Allgowe Department of Information Engineering and Process Control Slovak University of Technology Slovakia Institute for Systems Theory and Automatic Control (IST) University of Stuttgart Germany

control of turbocharged diesel engines is a challenging task due to system nonlinearities and constraints on the inputs and process variables. In this paper nonlinear model predictive control is applied to control a diesel engine with a variable geometry turbocharger and an exhaust gas recirculation valve. The overall control objective is to regulate the setpoints of the air-fuel ratio and the amount of recirculated exhaust gas in order to obtain low exhaust emission values and low fuel consumption without smoke generation. Simulation results are presented to study the advantages and disadvantages of nonlinear model predictive control. The achieved performance is compared in simulations with a linear state feedback controller and an input-output linearization based control method. As shown, nonlinear model predictive control achieves good overall control performance and constraint satisfaction.

关键词： Predictive models Predictive control Diesel engines Linear feedback control systems Nonlinear control systems control nonlinearities control systems Solid modeling Geometry Valves

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Adaptive Backstepping Sliding Mode Design for TCSC

Adaptive Backstepping Sliding Mode Design for TCSC

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World Congress on Intelligent control and Automation (WCICA)

作者： Likui Yi Jun Zhao Institute of Control Theory and Navigation Technology School of Information Science and Engineering Northeastern University Shenyang China

Based on a nonlinear second-order model for a single-machine infinite-bus system with TCSC, two kinds of nonlinear controller were designed using backstepping sliding mode methods. With backstepping sliding mode, the origin nonlinear system doesn't need to be linearized and the closed-loop error system is guaranteed to be asymptotically stable. When damping coefficients can't be measured inaccurately, a dynamic feedback controller can be designed using adaptive backstepping sliding mode containing the real-time estimation of uncertainty parameter. The design procedure reveals that the controller designed by backstepping sliding mode method has good performances and robustness

关键词： Backstepping Power capacitors Thyristors Sliding mode control Adaptive control Nonlinear control systems Nonlinear systems Damping Nonlinear dynamical systems Programmable control

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Optimization-based decomposition of a large-scale system

Optimization-based decomposition of a large-scale system

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1st IFAC Workshop on Applications of Large Scale Industrial Systems, ALSIS'06

作者： Rehák, Branislav Department of Control Engineering Faculty of Electrical Engineering Czech Technical University Technická 2 166 27 Praha 6 Czech Republic Institute of Information Theory and Automation Academy of Sciences of the Czech Republic P.O. Box 18 182 08 Prague Czech Republic

ISBN: (纸本)9783902661159

The problem of design of a controller for a large-scale system is studied. The design objective is to achieve behavior comparable with the standard controller that is LQ optimal. On the other hand the amount of interconnections between subsystems should be kept as small as possible. This is guaranteed by solving of an optimization problem where the number of interconnections is minimized while the difference in the values of the cost functional for the standard and decentralized controller is a constraint. To find the value of the cost of the decentralized control in presence of interconnections one can use linear matrix inequalities.

关键词： Linear matrix inequalities

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