Takeover control of attitude maneuver for failed spacecraft

To extend the operational life of the failed spacecraft, the technology of spacecraft attitude takeover control is used to take over its attitude control systems. The uncertain dynamics of failed spacecraft and the change of thruster configuration will constitute a formidable technical challenge for attitude takeover control. Therefore, a takeover control strategy based on control system reconfiguration is proposed for the failed spacecraft attitude maneuver. Firstly, a command filtering backstepping control method is used to reconstitute the control law and the stability of the system is analyzed using the Lyapunov function. Moreover, the reconfiguration of the thrusters is implemented by reconstituting the configuration matrix of the thrusters. Furthermore, considering the fuel consumption and the control inputs limitation, the thrust forces reallocation is achieved by the dynamic control allocation method based on constrained quadratic program. The method proposed in this paper achieves the takeover control of the failed spacecraft whose fuel has been exhausted or whose actuators are partially failed. Numerical simulations validate the feasibility of the proposed method.