Finite?time attitude consensus control for multiple rigid spacecraft based on distributed observers

The problem of attitude consensus control is addressed for multiple rigid spacecraft under a fixed interaction network where only subset followers can obtain the leader's state information. To estimate and angular velocity leader, group distributed finite-time observers constructed each follower. Then fast non-singular terminal sliding mode controllers are proposed based on observed Rigorous proofs presented to show performance closed-loop systems protocol including controllers. Numerical simulations provided illustrate protocol.