Release Time:2019-03-12  Hits:

Indexed by: Journal Article

Date of Publication: 2018-05-22

Journal: IET CONTROL THEORY AND APPLICATIONS

Included Journals: SCIE

Volume: 12

Issue: 8

Page Number: 1055-1063

ISSN: 1751-8644

Abstract: In this study, the robust estimation problem is investigated for discrete-time switched linear systems with unknown persistent excitation. The robust current estimator is proposed to estimate the real state of the switched systems without the stability restriction. The estimator input is constructed based on the current and previous information of a switching signal and output measurement. Owing to the reference system and its estimator, the exponential stability of the estimation error systems is presented under the average dwell time switching and arbitrary switching. The upper bound or the property of attenuation is unnecessary for the unknown input considered here. In addition, neither the conventional decoupling principle nor non-singular transformation is employed. At last, the effectiveness of established results is illustrated by a numerical example and a DC-DC boost converter.