Abstract

In this paper, we study /spl Lscr//sub 2/ gain properties for a class of switched systems which are composed of a finite number of linear time-invariant symmetric systems with time delay. We show that when all subsystems have the /spl Lscr//sub 2/ gains /spl gamma/ in the sense of satisfying an LMI, the switched system has the same /spl Lscr//sub 2/ gain /spl gamma/ under arbitrary switching. The key idea is to establish a common Lyapunov function for all subsystems in the sense of /spl Lscr//sub 2/ gain.

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