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Adaptive Fixed-Time Control for Attitude Consensus of Disturbed Multi-Spacecraft Systems With Directed Topologies

In this paper, the problem of leaderless fixed-time attitude consensus is studied for rigid spacecraft systems, where each spacecraft is subject to disturbance and the communication graph is directed. Based on the backstepping technique, a distributed control protocol is proposed to solve fixed-time attitude consensus problem. Then, to remove the dependence of control gains on the global information, an adaptive fixed-time control for attitude consensus is presented. Unlike the most existing consensus protocols, the parameters in the controllers for the spacecraft are chosen independently and can be different from each other. Finally, the performances of the proposed control protocol is illustrated through a numerical simulation.