a Department of Electrical and Computer Engineering, University of California, Engineering I, Room 5157, Santa Barbara, CA 93106-9560, USA b Department of Electrical Engineering, Yale University, New Haven, CT06520-8267, USA
Abstract:
This paper deals with the problem of switching between several linear time-invariant (LTI) controllers—all of them capable of stabilizing a specific LTI process—in such a way that the stability of the closed-loop system is guaranteed for any switching sequence. We show that it is possible to find realizations for any given family of controller transfer matrices so that the closed-loop system remains stable, no matter how we switch among the controller. The motivation for this problem is the control of complex systems where conflicting requirements make a single LTI controller unsuitable.