RESEARCH ARTICLE
Unified dwell time–based stability and stabilization criteria for switched linear stochastic systems and their application to intermittent control
Shixian Luo,
Feiqi Deng,
Wu-Hua Chen,
Shixian Luo
School of Automation Science and Engineering, South China University of Technology, Guangzhou, China
Search for more papers by this authorCorresponding Author
Feiqi Deng
School of Automation Science and Engineering, South China University of Technology, Guangzhou, China
Correspondence
Feiqi Deng, School of Automation Science and Engineering, South China University of Technology, Guangzhou 510640, China.
Email: [email protected]
Search for more papers by this authorWu-Hua Chen
College of Mathematics and Information Science, Guangxi University, Nanning, China
Search for more papers by this authorShixian Luo,
Feiqi Deng,
Wu-Hua Chen,
Shixian Luo
School of Automation Science and Engineering, South China University of Technology, Guangzhou, China
Search for more papers by this authorCorresponding Author
Feiqi Deng
School of Automation Science and Engineering, South China University of Technology, Guangzhou, China
Correspondence
Feiqi Deng, School of Automation Science and Engineering, South China University of Technology, Guangzhou 510640, China.
Email: [email protected]
Search for more papers by this authorWu-Hua Chen
College of Mathematics and Information Science, Guangxi University, Nanning, China
Search for more papers by this authorSummary
This paper considers the stability and stabilization problems for the switched linear stochastic systems under dwell time constraints, where the considered systems can be composed of an arbitrary combination of stable and unstable subsystems. First, a time-varying discretized Lyapunov function is constructed based on the projection of a linear Lagrange interpolant and a switching-time-dependent “weighted” function. The “weighted” function not only enforces the Lyapunov function to decrease at switching instants but also coordinates the dynamical behavior of the subsystems. As a result, some unified criteria for mean square stability and almost sure stability of the switched stochastic systems are established in terms of linear matrix inequalities. Based on the obtained stochastic stability criteria, 2 types of state feedback controllers for the systems are designed. Moreover, the novel results are applied to solve the intermittent control or the controller failure problems. Finally, conservatism analysis and numerical examples are provided to illustrate the effectiveness of the established theoretical results.
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