Abstract: The Component Synthesis active Vibration Suppression method (CSVS) can be applied to suppress the vibrations of flexible systems. In this method, several same or similar time-varying component forces are arranged according to certain rules along the time axis. The resulted synthesized force can be adopted as system input, and it can suppress the arbitrary unwanted vibration harmonics while achieving the desired rigid body motion. For a kind of spacecrafts with constant amplitude reaction jet actuators, the time optimal maneuver control commands corresponded with the roles of CSVS method were converted into form of constant amplitude torque using Pulse Width Modulation (PWM). The time optimal large maneuver control strategies are designed as well. Simulation results verified the availability of this method.