Global stabilizability of uncertain systems with time-varying delays via dynamic observer-based output feedback

In this paper, the dynamic observer-based output feedback control for uncertain time-delay systems with time-varying delays is investigated. A delay-independent dynamic observer-based output feedback control is proposed such that the feedback-controlled system with time-varying delays is globally asymptotically stable if some mild conditions are met. An upper bound of arbitrary time-varying delays without destroying stability is also given such that the asymptotic stability is preserved. A numerical example is given to illustrate the use of our main results. (C) 2002 Elsevier Science Inc. All rights reserved.