Dual Event-Triggered-Based Fault-Tolerant Attitude Flexible Performance Tracking Control for Satellite

Abstract

In this article, a dual event-triggered (ET)-based fault-tolerant attitude flexible performance tracking control problem is studied for the satellite with input saturation, actuator fault and external disturbance. To make the prescribed performance function (PPF) be adjusted only when the attitude tracking error of the satellite violates the PPF, a predictive tracking error-based ET mechanism is designed. With the designed mechanism, the fault factor adaptive law and saturation difference are updated only when the tracking error violates the PPF. In addition, an ET command regulation scheme is designed, taking into account the performance of the system and the saving of communication resources. It is proved that the closed-loop system is stable by the Lyapunov method. Finally, the simulation results demonstrate the availability of the proposed tracking control scheme.