Event-Triggered Sliding Mode Control of Stochastic Systems over Networks

This paper presents an event-triggered sliding mode control (SMC) scheme for a class of uncertain stochastic systems over networks. System output is adequately sampled for further computation of a discrete-time event-trigger mechanism. Network-induced delays are described from event-trigger to controller. An event-driven zero-order-hold (ZOH) is employed to keep receiving and sending the delayed measurement for further control update, and an observer is used to estimate the system state, which facilitates the design of sliding mode surface. Using Lyapunov stability theory, a novel sliding mode control law based on the measurement and observer state is presented to guarantee the stochastic stability of the overall system dynamics. Simulation results are provided to illustrate the effectiveness of the presented event-triggered SMC scheme.