期刊
SYSTEMS & CONTROL LETTERS
卷 43, 期 5, 页码 355-359出版社
ELSEVIER
DOI: 10.1016/S0167-6911(01)00118-9
关键词
parameter dependent Lyapunov functions; discrete time systems; time varying parameters
In this paper, we consider discrete time systems with polytopic time varying uncertainty. We look for a class of parameter dependent Lyapunov functions which are quadratic on the system state and depend in a polytopic way on the uncertain parameter. We show that extending the new discrete time stability condition proposed by de Oliveira et al. (Systems Control Lett. 36 (1999) 135.) to the case of time varying uncertainty leads to a necessary and sufficient condition for the computation of such a Lyapunov function. This allows to check asymptotic stability of the system under study. The obtained linear matrix inequalities condition can also be used to cope with the control synthesis problem. (C) 2001 Elsevier Science B.V. All rights reserved.
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