Adaptive inverse optimal control for satellite attitude fault-tolerant control

The adaptive inverse optimal fault-tolerant control based on satellite attitude control system is developed for a three axis stabilized satellite taking the actuator faults into account. Based on the inverse optimal principle by using the integrator backstepping method to design the Adaptive Control Lyapunov Function (ACLF), the adaptive inverse optimal fault-tolerant controller is designed by taking the uncertainty parameter as the on-line estimated adaptive parameter. Stability of the closed-loop system is presented based on the Lyapunov analysis. The corresponding simulation results are given to demonstrate the effectiveness of the control scheme. Results show that the proposed design based on adaptive inverse control method can guarantee the satellite fault-tolerant actuator system working in good performance in the case of partial loss of control effectiveness induced by actuator failures.