Browsing by Author "CHEN, HG"

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IMPROVED QUANTITATIVE MEASURES OF ROBUSTNESS FOR MULTIVARIABLE SYSTEMS
(1994-04-01)
CHEN, HG
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HAN, KW
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電控工程研究所
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Institute of Electrical and Control Engineering
Asymptotically stable linear systems subject to unstructured time varying perturbations are considered. Allowable perturbation bounds are obtained such that the perturbed systems remain stable. These bounds are derived iteratively by means of adjusting a sequence of Lyapunov matrices. In comparison with existing methods, less conservative quantitative measures of robustness are obtained.
STABILITY-ROBUSTNESS ANALYSIS FOR LINEAR-SYSTEMS WITH STATE-SPACE MODELS
(1993-09-01)
CHEN, HG
;
HAN, KW
;
交大名義發表
;
電控工程研究所
;
National Chiao Tung University
The stability-robustness analysis for linear systems with state-space models is considered. The fundamental problem of linear control systems subject to unstructured perturbations is addressed, and the results are extended to the consideration of linear control systems subject to linear structured perturbations. A modified time-domain Lyapunov-based method of stability-robustness analysis is proposed where iterative interpolations of quadratic Lyapunov functions are considered. By use of the proposed method, less conservative allowable perturbation bounds are obtained, and the resulting Lyapunov matrices possess structural informations closely related to the perturbation-susceptible characteristics of the nominal system state matrix. The robustness behaviour of a vertical takeoff and landing (VTOL) aircraft control system, designed by use of the LQR state-feedback method, is illustrated.