An event-triggered design scheme for spacecraft attitude control

In this paper, to reduce the communication burden between the controller and the actuator, we propose an event-triggered control design scheme for the spacecraft attitude stabilization problem. The main idea is that we design the controller and the triggering event simultaneously such that the controller can effectively compensate for the measurement errors caused by the event-triggering mechanism. Two different kinds of triggering events, i.e. the fixed threshold strategy and the relative threshold strategy, are considered according to practical situations. Through Lyapunov analysis, it is shown that the proposed event-trigger control schemes guarantee that the spacecraft attitude tracking error and the angular velocity error will exponentially converge towards an adjustable set around zero.