Asymptotic rejection of persistent /spl Lscr//sub /spl infin//-bounded disturbances for nonlinear systems

Asymptotic properties of nonlinear /spl Lscr//sup 1/-control systems are characterized. The problem of designing a controller for a nonlinear system such that the resulting system starting from any initial state will eventually have /spl Lscr//sup 1/-performance is addressed. The Lyapunov technique is used in the analysis with a naturally defined nonsmooth Lyapunov function.

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