Global Uniform Asymptotic Stability Criteria for Linear Uncertain Switched Positive Time-Varying Delay Systems with All Unstable Subsystems

Thaned Rojsiraphisal, Piyapong Niamsup and Suriyon Yimnet
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Thaned Rojsiraphisal: Department of Mathematics, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
Piyapong Niamsup: Department of Mathematics, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
Suriyon Yimnet: Department of Mathematics, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand

Mathematics, 2020, vol. 8, issue 12, 1-18

Abstract: In this paper, the problem of robust stability for a class of linear switched positive time-varying delay systems with all unstable subsystems and interval uncertainties is investigated. By establishing suitable time-scheduled multiple copositive Lyapunov-Krasovskii functionals (MCLKF) and adopting a mode-dependent dwell time (MDDT) switching strategy, new delay-dependent sufficient conditions guaranteeing global uniform asymptotic stability of the considered systems are formulated. Apart from past studies that studied switched systems with at least one stable subsystem, in the present study, the MDDT switching technique has been applied to ensure robust stability of the considered systems with all unstable subsystems. Compared with the existing results, our results are more general and less conservative than some of the previous studies. Two numerical examples are provided to illustrate the effectiveness of the proposed methods.

Keywords: mode-dependent dwell time; global stability; switched positive systems; time-varying delay systems; unstable subsystems (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2020
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