Learning observer based and event-triggered control to spacecraft against actuator faults

This paper addresses the attitude control problem to spacecraft against actuator faults. A novel observer based event-triggered control (OETC) approach is proposed to cope with external disturbances, actuator faults and reduce the control updating frequency. First, a learning observer (LO) is utilized to reconstruct actuator faults and disturbances. Then, based on the LO, an event-triggered control (ETC) scheme is designed to achieve attitude stabilization from the reconstructed knowledge. The innovation is that the integrated OETC possesses resource-saving advantages of both LO and ETC, which haven't been used before. Moreover, the design method is simple and easy to operate. Simulations are given to demonstrate the validities of the proposed algorithm.