Design and control of a dual-stage actuation active vibration isolation system

Active vibration isolation system is used in various fields to reduce the vibrations transmitted. In this paper, a novel dual-stage actuator is proposed, which combines a voice coil motor and a piezoelectric actuator. The proposed dual-stage actuator maintains the advantages, in terms of the long stroke, the high precision, and the wide band. The dual-stage actuation active vibration isolation system (DSA-AVIS) with the proposed dual-stage actuator is initially modeled. The characteristic of the DSA-AVIS is subsequently analyzed. $H{\infty }$ controller is finally designed to consider the vibration isolation performance and the output range of the actuators. The experimental results indicate that the closed-loop transmissibility of the DSA-AVIS is less than-18 dB from 0 to 100 Hertz.