A NTSMCLF Attitude Tracking Controller for the Satellite with Flexible Accessories Based on the Stewart platform

In this paper, a novel class of finite-time high precision satellites attitude tracking controller based on nonsingular terminal sliding mode control Lyapunov function (NTSMCLF) with the Stewart platform active vibration isolation is proposed. An active vibration algorithm for Stewart platform is designed to isolate the micro-vibration, which uses sliding mode variable Structure Control (SMC) method. In order to suppress the influence of vibration on satellite, the dynamical model of Stewart platform considering the physical constraints, noise immunity and robustness of passive vibration isolation mechanical structures is designed. Considering the controller accuracy and infinite time convergence, the finite-time control Lyapunov function (CLF) high-precision attitude tracking control algorithm based on nonsingular terminal sliding mode (NTSM) is provided. The finite-time stability of the system is guaranteed. Numerical simulation results are provided to validate the effectiveness of proposed control method.