Predefined-time attitude tracking control for uncertain rigid spacecraft with guaranteed performance

Abstract

This brief tackles the predefined-time guaranteed performance attitude tracking problem of rigid spacecraft in presence of uncertain inertia and disturbances. Primarily, a novel non-singular predefined-time terminal sliding mode (NPTSM) surface with the prescribed performance attitude tracking errors is constructed. Secondly, a robust NPTSM control (NPTSMC) is developed to tackle the predefined-time attitude tracking problem for uncertain spacecraft. It is proved that the designed NPTSMC can assure that the attitude tracking errors satisfy the prescribed performance boundaries and globally converge to a predefined small region centered on the equilibrium point in predefined time and then converge to the equilibrium point asymptotically. The advantage of the NPTSMC is predefined-time stability with quantified transient, steady-state and settling time performance. The effectiveness performance of the exploited approach is verified numerical simulation results.