Abstract:

The problem of relative attitude and position control involved in satellite rendezvous and docking is studied based on a physical ground simulation system for rendezvous and docking. Based on the structure of the physical ground simulation system, the coupled 6 degrees of the freedom dynamics model is developed to describe the motion of the system, and then based on the proposed model, a robust finitetime control scheme is designed by using an adaptive fast nonsingular terminal sliding mode control method, the controller can overcome the singularity problem of the traditional terminal sliding mode control under the disturbed condition. Lyapunov theory and simulation results show that the proposed controller can guarantee the finitetime stability and convergence of the system, meanwhile, it can effectively restrain external bounded disturbances.