Adaptive finite-time control for spacecraft to track and point non-cooperative space targets

In this paper, we investigate the problem of tracking and pointing on-orbit non-cooperative targets. We establish the orbit and attitude dynamics equations between tracking spacecraft and non-cooperative targets in line-of-sight and body-fixed coordinate systems. Moreover, considering the bounded inputs of spacecraft, we propose the adaptive finite-time tracking and pointing control algorithm, which achieves finite-time stability of the closed-loop systems. Numerical simulation is given to illustrate the effectiveness of the proposed method.