H_∞ output feedback control for polytopic Delta operator systems

摘要

The problem of dynamic output-feedback H_∞ control for polytopic Delta operator systems is investigated. Based on Bounded Real Lemma, an improved presentation of H_∞ performance is proposed. Upon this performance criterion, a developed parameter-dependent approach is used to design a robust output-feedback controller. A sufficient condition for dynamic output-feedback H_∞ controller is derived in terms of matrix inequalities. The designed controller can be obtained from the solution of an iteration method. The proposed controller design procedure is less conservative. A numerical example is given to test the feasibility and advantage of the proposed approach.