Output feedback stabilization of networked control systems with a logic zero-order-hold

Abstract

This paper is concerned with output feedback stabilization of a networked control system in the discrete-time domain. First, a logical zero-order-hold is introduced to select the newest data packets to drive the plant, with which network-induced delays and data packet dropouts can be expressed explicitly. Second, an auxiliary vector-valued function is introduced to establish a novel finite-sum inequality, which can provide a tighter bound than some existing ones for some finite-sum term. Third, this finite-sum inequality is employed to formulate a stability criterion for the closed-loop system under consideration. It is proven that the stability criterion is of less conservatism than some existing ones reported in the literature. Fourth, a cone-complementary-linearization-based algorithm is presented to design suitable output feedback controllers. Finally, three examples are given to show the effectiveness of the proposed method.