Fixed-time attitude stabilization for a rigid spacecraft

This paper mainly investigates the problem of the attitude stabilization for a rigid spacecraft based on the model of Modified Rodriguez Parameters. A fixed-time attitude stabilization controller is designed to guarantee that the attitude of the rigid spacecraft will be stabilized to the equilibrium in a fixed time which is independent of any initial condition. The design of fixed-time attitude controller is mainly based on improved backstepping method. The proposed fixed-time attitude control scheme can deal with not only the parameters’ uncertainties but also the external disturbances. Reliability and effectiveness of the proposed approach are proved by simulations.