On a switching control scheme for nonlinear systems with ill-defined relative degree

Chen, W.-H. and Ballance, D.J. (2002) On a switching control scheme for nonlinear systems with ill-defined relative degree. Systems and Control Letters, 47(2), pp. 159-166. (doi:10.1016/S0167-6911(02)00186-X)

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Publisher's URL: http://dx.doi.org/10.1016/S0167-6911(02)00186-X

Abstract

This paper discusses the applicability of a switching control scheme for a nonlinear system with ill-defined relative degree. The control scheme switches between exact and approximate input-output linearisation control laws. Unlike a linear system under a switching control scheme, the equilibria of a nonlinear system may change with the switching. It is pointed out that this is not sufficient to cause instability. When the region of the approximate linearisation control law is attractive to the exact zero dynamics, it is possible that the closed-loop system under the switching control scheme is still stable. The results in this paper shows that the switching control scheme proposed in Tomlin and Sastry (Systems Control Lett. 35(3) (1998) 145) is applicable for a wider class of nonlinear systems.

Item Type:Articles
Additional Information:Final version as accepted by Systems and Control Letters supplied by the author
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Ballance, Dr Donald
Authors: Chen, W.-H., and Ballance, D.J.
Subjects:T Technology > T Technology (General)
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Systems and Control Letters
Publisher:Elsevier Science
ISSN:0167-6911
Copyright Holders:Copyright © 2002 Elsevier Science B.V.
First Published:First published in Systems and Control Letters 47(2):159-166
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher.

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