Variable Structure PID Controller for Satellite Attitude Control Considering Actuator Failure

In this paper, a variable structure PID controller with good convergence rate and robustness for satellite attitude is proposed. order to improve the system rate, proportional differential term was designed, an angular velocity curve better achieved by structure. addition, integral partitioning algorithm disturbance torque improved; meanwhile, negative effect of avoided during converging process. The actuator failure condition also considered, fault tolerant control designed. System stability analyzed Lyapunov method, its performance demonstrated numerical simulation.