Abstract: Thrusters and reaction wheels are combined to stabilize the attitude of the platform as a large disturbance may exist during launch process. A thrusterbased minimum time control law and a reactionwheelbased sliding mode control law are investigated, and the switching condition of the hybrid control is presented. The rapidity, accuracy, and the flexible vibration suppression capacity of the control strategy are validated by the numerical simulation.

Key words: space platform, hybrid attitude control, thrusters, reaction wheels