SPIN-AXIS STABILIZATION OF AN UNDERACTUATED ACCOMPANYING SATELLITE AROUND THE SPACE STATION

摘要

This paper mainly deals with the spin-axis stabilization of an underactuated accompanying satellite (AS) around the space station(SS) in the presence of sinusoidal disturbance. The concept of accompanying satellites around the space station (SS) is introduced. Both the AS and the SS are modeled as rigid bodies, with the reference coordinate frames defined for the AS pointing to the SS according to different missions. Then the paper discusses the stabilization control of the spin-axis of the underactuated AS when it tracking the SS under sinusoidal disturbance, which is the novelty of the paper. By applying the backstepping control method and the internal model principle, the paper derives a new control law based on a new kinematic formulation and then proves the global asymptotic stability of the controller by combining the Lyapunov direct method with the Barbalat's lemma. The analytical and simulation results show that the proposed control law is very effective in the presence of sinusoidal disturbance.