Event-triggered annular finite-time [formula omitted] filtering for stochastic network systems

Abstract

The event-triggered annular finite-time H∞ filtering problem is addressed for stochastic network systems in this paper. The influence of stochastic disturbance is considered in the whole framework of filter design. A zero-order-holder (ZOH) is introduced to maintain and send the delayed output signals for filter updating. By resorting to a novel delay-dependent Lyapunov-Krasovskii functional (LKF) and LMI technique, the stochastic annular finite-time boundedness of the filtering error system is analyzed. Furthermore, the H∞ filter design under the event-triggered mechanism is established in the sense of a prescribed H∞ performance level. Finally, two numerical examples are realized to illustrate the validity of the proposed results.