Commuting and stable feedback design for switched linear discrete-time systems

In the paper, commuting and stable feedback design for switched linear systems is investigated. This problem is formulated as to build up state feedback controller for each subsystem such that the closed-loop systems are not only asymptotically stable but also commuting each other. A new concept, common admissible eigenvector set (CAES), is introduced to establish necessary/sufficient conditions for such feedback controllers. For second-order systems, a equivalent condition is established. Moreover, a parametrization of the CAES is also obtained. The motivation comes from stabilization of switched linear systems which consist of a family of LTI systems and a switching law specifying the switching between them, where if all the subsystems are stable and commuting each other, then the total system is stable under arbitrary switching.

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