Abstract
In this paper, we consider H∞ output feedback control problems for bilinear systems. First we derive two types of H∞ output feedback controller via differential game approach. The controllers are characterized in terms of the solutions to two Riccati inequalities depending on the state of generalized plant or controller. We propose an algorithm to solve the. Riccati inequalities via specifying a domain of the state and solving constant coefficient Riccati inequalities. The proposed algorithm includes an evaluation method for the domain of internal stability. Based on this algorithm, finaly we present a design example of artificial rubber muscle actuator control system.