Adaptive tracking control for spacecraft hovering to noncooperative target with trajectory generator

摘要

By using the nonlinear line-of-sight (LOS) relative motion model, this paper considers the tracking control for spacecraft hovering problem with mass uncertainty. As a stepping stone, the classical second order system is introduced to construct the dynamic process. Then, by utilizing the skew-symmetric property and a differentiable projection function, an adaptive tracking control scheme is proposed, which allows the convenience of adjusting the system state convergence rate and generated thrust force. The establishment of practical stability of closed-loop error system is guaranteed by Lyapunov's second method. Finally, simulations are given to demonstrate the system performance with proposed control scheme.