DecentralizedH∞ Control of Large-Scale Systems

This paper considers decentralizedH∞control problems for large-scale interconnected systems, the information structure constraints of which are conformable to the subsystems. Both output feedback and state feedback are dealt with. The design of localH∞controllers involves solving two algebraic Riccati equations of the subsystem dimensions. Sufficient conditions on the interconnections among subsystems are presented for desiredH∞ attenuation bounds to be achieved from the overall disturbance inputs to the overall controlled outputs by localH∞controllers.