摘要

Two attitude coordination controllers that make the system converge to the equilibrium point in finite time are designed for spacecraft formation flying with actuator saturation constraints. The first finite-time attitude coordination controller is suitable for the situation that all states of the closed-loop system are available. To deal with the problem of failing to measure angular velocity, a novel filter is presented in the second finite-time attitude coordination controller. Because the model of spacecraft formation flying is established based on the rotation matrix, the closed-loop system does not have the drawback of unwinding. The theoretical analysis and simulation results are given to prove the validity of the proposed controllers.