Active Vibration Control of Piezoelectric Sandwich Plates

This paper deals with the active vibration control of piezoelectric sandwich plate. The structure consists of a substrate plate layer sandwiched between two layers of piezoelectric sensor and actuator. Based on laminate theory and constitutive equation of piezoelectric material, the vibration active control dynamic equation of the sandwich structure is established by using hypothetical mode method and Hamilton principle. The Rayleigh-Ritz method is used to solve it. The form of hypothetical solution is used for approximate solution, which is simple and accurate. The method of this paper is verified by several examples. The parametric studies of the sandwich plate structures are carried out. The results show that applying different boundary conditions and piezoelectric patch positions to the structures have a great influence on the natural frequency. When the driving voltage increases, the deflection of the plate structures increase approximately linearly. The active vibration control studies are investigated as well. The results show that within a certain range, the larger the value of the speed feedback coefficient, the better the active control effect. The positions of the piezoelectric patches affect the effectiveness and cost of active control. When the piezoelectric plate is located at the fixed end, the effect and cost of active control are better than that at the midpoint and free end of the plate.

Automated summary

This paper focuses on the active vibration control of piezoelectric sandwich plate. The study establishes the dynamic equation for active control based on laminate theory and constitutive equation of piezoelectric material, and solves it using the Rayleigh-Ritz method. Parametric studies are conducted to analyze the effects of different boundary conditions and piezoelectric patch positions. The results show that these factors significantly impact the natural frequency of the plate structures. Moreover, the study also investigates active vibration control and finds that the speed feedback coefficient and position of the piezoelectric patches play important roles in the control effectiveness and cost.