Integrated translational and rotational finite-time maneuver of a rigid spacecraft with actuator misalignment

This study deals with the problem of integrated translation and rotation finite-time maneuver of a rigid spacecraft with actuator misalignment. In view of the system natural couplings, the coupled translational and rotational dynamics of the spacecraft is derived, where a thruster configuration with installation misalignment is taken into account. An integrated finite-time control strategy is proposed by using terminal sliding mode technique to enable the spacecraft to track command position and attitude in a pre-determined time. Within the Lyapunov framework, the finite-time stability of the closed-loop system is guaranteed in the presence of the thruster misalignment and bounded disturbances. A scenario numerical simulation demonstrates the effect of the designed control strategy.0

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