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DYNAMIC OUTPUT FEEDBACK COMPENSATOR FOR TIME-STAMPED NETWORKED CONTROL SYSTEMS

We propose a dynamic output-feedback compensator for time-stamped Networked Control Systems (NCS). The design methodology is based on the use of a polytopic with additive norm-bounded representation for the NCS. The dynamics of the proposed compensator depends on the delays induced by the network, which are supposed not to be greater than the sampling period and possible to compute from the information provided by time-stamped messages. The closed-loop stability and some time-performance are guaranteed from the use of a parameter dependent candidate Lyapunov function. The synthesis of the compensator gains are described in terms of Linear Matrix Inequalities (LMIs). A numerical example and simulations of the NCS are provided to show the applicability of the proposed compensator. Keywords— Networked control systems, dynamic output feedback, time varying delays, time-stamped messages, parameter dependent Lyapunov function.