Reliable decentralized stabilization of feedforward and feedback interconnected systems

Synthesis of decentralized stabilizing controllers that are reliable in the presence of breakdowns in the compensator and subsystem interconnections are considered for plants obtained via feedforward- and feedback-type interconnection schemes. It is shown that the central property for reliable decentralized stabilization is always an appropriate parity interlacing property among the poles of the interconnection subplants, and certain blocking zeros of the overall plant.<<ETX>>