Abstract
This paper investigates the problem of robust H/sub /spl infin//-output feedback control for nonlinear systems with time-varying parameter uncertainty satisfying some integral functional constraints. We address the problem of designing a compensator such that the L/sub 2/-gain of the mapping from the exogenous input noise to the penalty output is minimized or guaranteed to be less than or equal to a prescribed value. We establish the interconnection between the robust nonlinear H/sub /spl infin//-control problem and the nonlinear H/sub /spl infin//-control problem, Based on this connection, a sufficient condition for the existence of a solution to the robust nonlinear H/sub /spl infin//-output feedback control problem is derived in terms of a "scaled" Hamilton-Jacobi inequality.
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