Research on Active-Passive Hybrid Vibration Isolator Based on Piezoelectric Reactor and Micro-Amplitude Isolator

The precision payload or instruments on the spacecraft were disturbed by micro vibration. Aiming at vibration isolation, an active-passive hybrid vibration isolator based on piezoelectric reactor and micro-amplitude isolator is proposed, witch combined with the active vibration control and passive isolation method. The dynamic model of the hybrid isolator is established, an active control algorithm was designed by using the feed-forward feedback composite control mode. The simulation result shows that, the displacement excitation can be isolated effectively in full frequency segment. Theoretically, the validity and feasibility of the isolator are proved, which provides a reference for the isolation performance test.