Fully distributed event-triggered asymptotic attitude coordination of multiple spacecraft systems with disturbances

This article studies the leader-following attitude coordination problem of a group of rigid spacecraft subject to communication constraint, disturbances and uncertain control coefficient matrices. A fully distributed adaptive anti-disturbance attitude coordinated control scheme with event-triggering mechanism is developed. First, the event-triggered adaptive distributed observer is designed for each follower to estimate the leader's information without continuous communication requirement. Based on the estimated information, the adaptive anti-disturbance attitude tracking controller is designed such that asymptotic coordinated tracking can be achieved under additive disturbances and actuators' partial loss of efficiency. The proposed control scheme ensures that all the closed-loop signals are bounded and the positive lower bound of inter-event times exists in each subsystem. Simulation results illustrate the effectiveness and flexibility of the proposed control scheme.