Parameter Identification And Vibration Control Of Piezoelectric Intelligent Beam

The vibration control,a branch of intelligent structure's application,has been widely adopted in many areas, especiallyin aerospace industry, where it's great potential has been already shown.This paper mainly studies work is aimed at piezoelectric smart beam structure.On the basis of reading lots of reference at home and abroad,Choose different control methods for the vibration of piezoelectric smart beam, to achieve the vibration controller, and the effect of different controller were compared.In this paper, the first step is using Morlet wavelet for the parameter identification of modal.As can be seen through the data comparison, this paper adopts the identification method can accurately identify the structure of the natural frequency and damping ratio;And then this paper concerning on the active vibration control of piezoelectric cantilever beam. First the finite element equations of the beam is deduced, and balancing reduction in state-space models to reduce its order.Using PID control law, LQR control law and mixed sensitivity control law for the controller design, Then compare vibration suppression effects of different controllers. MATLAB mathematical simulation shows that the method used in this paper is valid.