Research of dynamics analysis and active control of suspension smart structure

Abstract

As it is difficult to modelize the vibration active control of smart structure. Piezoelectric equations and the elastic mechanics equations are adopted to establish the electromechanical coupling finite element equations and dynamics equations of suspension smart structure with piezoelectric actuators. Then the finite element model of smart structure vibration control can be finally established. Since the controlled object has the characteristic of model uncertainty and disturbance. The controller is designed by the mixed sensitivity H ∞ control method. Control simulation results show that the vibration decay time is about 2.12 seconds and decays faster. The effect of vibration active control is better and the ability of anti-interference is stronger. Thus, this proved that the established vibration active control equation of smart structure with piezoelectric actuator element is correct and that the controller is effective.