Active and passive integration of vibration isolator based on piezoelectric-rubber

A novel piezoelectric-rubber active-passive integration combination vibration isolator is proposed to meet the vibration isolation requirement of near space vehicle sensitive instruments by combination of the active vibration control and passive control methods. The dynamics model of active and passive integration of vibration isolation system is established by structural design of piezoelectric stack actuator and the rubber isolation. The feed-forward and feed-back combination controls are employed to design the active control algorithm for the double-layer vibration isolation system. Combining the classic Stewart isolation platform, a novel near space vehicle active and passive integration isolation platform is designed. The numerical simulation analysis under various excitation signals has been done by Matla/Simulink co-simulation technology. From the numerical simulation, it shows that the displacement excitation from the ground in the whole frequency domain can be effectively isolated by the designed isolator, and the designed isolation platform is effective and feasible in theory, which lays the foundation for further experimental studies.