Adaptive Finite-Time Attitude Tracking Control for State Constrained Rigid Spacecraft Systems
Lin Zhao, Guoqing Liu
Abstract
This brief studies the adaptive finite-time attitude tracking control of rigid spacecraft systems with full-state constraints and external disturbance. Based on the barrier Lyapunov function, a novel finite-time command filtered backstepping control algorithm is proposed, which can not only avoid computing the differential of virtual control signal, but also guarantee the predefined state constraints are not violated. The adaptive control technique is applied to estimate the upper bound of disturbance, and the designed controller with adaptive updating laws can make the tracking error converge to an adjustable neighborhood of the origin in finite time. Simulation results show the effectiveness of the present control method.