Abstract
The problem of attitude synchronization for a group of rigid spacecraft is investigated in this chapter under the general directed communication topology. Combining the strategies of finite-time control, fast terminal sliding mode (FTSM) control, and adaptive control, a novel decentralized finite-time control law is proposed in the presence of inertia uncertainties and environmental disturbances. The new control scheme ensures that each spacecraft can attain the desired time-varying attitude and angular velocity in finite time while maintaining attitude synchronization with other spacecraft in the formation. The feasibility of the control algorithm is investigated by an illustrative simulation example.
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