Event-triggered coordinated attitude control for satellite formation under switching topology

Abstract

Event-triggered coordinated attitude control problem for satellite formation under switching topology is investigated in this article. First, triggering function with state error is designed to adjust update period of controller. Event is triggered, state information is sampled, and controller is updated if and only if triggering condition is satisfied, while controller in nontriggering time uses state information of triggering time. Then, in the existence of model uncertainties, distributed adaptive attitude controller based on event-triggered strategy is proposed for satellite formation with leader-follower architecture. Under directed switching graph, formation system is proved to be asymptotical convergence by Lyapunov stability theory, and inter-event time interval is given to avoid Zeno behavior. At last, simulation results show that the proposed event-triggered adaptive attitude controller can reduce execution frequency of control tasks, as well as ensure control performance of cluster system.