Finite-Time Attitude Control for Coupled Spacecraft with Input Constraints

In this paper, a finite-time saturated attitude control algorithm is proposed for coupled spacecraft under flexible vibration, liquid sloshing, model uncertainty and external disturbance. By adding a feedback term, a saturated super-twisting sliding mode control algorithm is designed to realize coupled spacecraft attitude control in finite time. The main feature of the proposed control algorithm is that it is continuous and control torque to regulate the coupled spacecraft system affected by lumped uncertainty in finite time. Finally, the simulation results are given to verify the effectiveness of the proposed control algorithm.