Fixed-time attitude cooperative fault-tolerant control with prescribed performance for heterogeneous multiple satellite

Abstract

This paper mainly investigates the fixed-time cooperative fault-tolerant control problem for heterogeneous satellite attitude control systems with external disturbances, actuator faults, and unknown inertia uncertainties. Firstly, the asymmetric prescribed performance mechanism is utilized to impose desired performance functions on satellite attitude tracking errors. Then, the fixed-time neuroadaptive technique is adopted to approximate unknown system uncertainties, and a novel fixed-time fault-tolerant controller is thus proposed to ensure that the transformed tracking errors converge to a small neighborhood of origin within a fixed time. Moreover, the Lyapunov theory is employed to validate that the closed-loop system is fixed-time stability under the control scheme. Finally, simulations results are carried out to verify the effectiveness of proposed strategy.