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.

Event-triggered adaptive fault-tolerant attitude synchronization and tracking control of multiple rigid bodies with finite-time convergence

“…Different from time-triggered control in a periodic manner, ETC updates its states when its event-triggering condition holds, that is, the error between the sampled and the real-time states exceeds a certain threshold value (Wang et al, 2018). Although ETC has been studied on a single vehicle attitude control problem repeatedly (Chenliang et al, 2019; Wu et al, 2018; Liu et al 2020a; Wang et al, 2019b, 2019c; Xing et al, 2017; Tian et al, 2020; Jiang et al, 2019; Ghasemzadeh Ebli and Nekoui, 2019; Xu et al, 2020), more challenging problems arise in the decentralized cooperative attitude control of multiple vehicles (Weng et al, 2016; Guo and Zhang, 2019; Zhou et al, 2018; Liu et al, 2020b; Weng and Yue, 2016; Zhang et al, 2018; Guo et al, 2020; Wang et al, 2020; Xu et al, 2019) where the information of the neighboring vehicles is not continuously available for making each vehicle’s control signal because of decreasing the communication pressure among the vehicles. For example, Guo and Zhang (2019) propose an event-based adaptive coordinated attitude controller for chip satellite cluster.…”