Fault tolerant decentralized H∞ control for symmetric composite systems

Discusses a class of large-scale systems composed of symmetrically interconnected identical subsystems. We consider the decentralized H/sub /spl infin// control design problem and study the fault tolerance of the resulting system. By exploiting the special structure of the systems, a sufficient condition for the existence of a decentralized H/sub /spl infin// controller is derived. Moreover, for the nominal case as well as for contingent situations characterized by control channel failures, the poles and the H/sub /spl infin//-norm of the closed-loop system can be calculated easily based on certain systems of reduced dimensions. Consequently, the tolerance to actuator failure can, be easily tested.

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