Finite-time Spacecraft Attitude Stabilization Control Subject to Parameter Uncertainties

We propose a novel, finite-time control scheme based on the homogeneous method for a rigid spacecraft with parameter uncertainties and external disturbances. First, the spacecraft attitude control system is transformed into a cascading system by introducing an adaptive variable. Second, we propose a novel control scheme of finite-time attitude stabilization for the rigid spacecraft based on the homogeneous method. Next, we prove the asymptotic stability of the system with parameter uncertainties and finite-time stability of the closed-loop system without parameter uncertainties based on Lyapunov theory. Finally, the proposed algorithm is demonstrated on a rigid spacecraft attitude stabilization control mission, and the digit simulation demonstrates that the control strategy is feasible and effective.