Stability analysis of switched systems with stable and unstable subsystems: an average dwell time approach

Author: Zhai Guisheng   Hu Bo   Yasuda Kazunori   Michel Anthony N.  

Publisher: Taylor & Francis Ltd

ISSN: 1464-5319

Source: International Journal of Systems Science, Vol.32, Iss.8, 2001-08, pp. : 1055-1061

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

Previous Menu Next

Abstract

We study the stability properties of switched systems consisting of both Hurwitz stable and unstable linear time-invariant subsystems using an average dwell time approach. We propose a class of switching laws so that the entire switched system is exponentially stable with a desired stability margin. In the switching laws, the average dwell time is required to be sufficiently large, and the total activation time ratio between Hurwitz stable subsystems and unstable subsystems is required to be no less than a specified constant. We also apply the result to perturbed switched systems where nonlinear vanishing or non-vanishing norm-bounded perturbations exist in the subsystems, and we show quantitatively that, when norms of the perturbations are small, the solutions of the switched systems converge to the origin exponentially under the same switching laws.