Stabilizability of switched linear systems does not imply the existence of convex Lyapunov functions

Counterexamples are given which show that a linear switched system (with controlled switching) that can be stabilized by means of a suitable switching law does not necessarily admit a convex Lyapunov function. Both continuous and discrete-time cases are considered. This fact contributes in focusing...

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Bibliographic Details
Main Authors: Blanchini, F., Savorgnan, C.
Format: Conference Proceeding
Language:English
Subjects:
Control systems
Linear systems
Lyapunov method
Stability
Sufficient conditions
Switched systems
Switches
Switching systems
Uncertain systems
USA Councils
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Summary:Counterexamples are given which show that a linear switched system (with controlled switching) that can be stabilized by means of a suitable switching law does not necessarily admit a convex Lyapunov function. Both continuous and discrete-time cases are considered. This fact contributes in focusing the difficulties encountered so far in the theory of stabilization of switched systems. In particular the result is in contrast with the case of uncontrolled switching in which it is known that if a system is stable under arbitrary switching then admits a polyhedral norm as a Lyapunov function
ISSN:0191-2216
DOI:10.1109/CDC.2006.376748