Active piezoelectric-structure acoustic control of enclosed-cavity

Piezoelectric sensor and actuator has been highly concerned in active control with its perfect properties. In this paper, a refined hybrid enhanced assumed strain piezoelectric shell element and acoustical isoparametric element were introduced to investigate coupled problem of piezoelectric-structure acoustic. First, a formulation to calculate the response of coupled problem was presented. Second, the negative-velocity constant gain feedback strategy was used for control algorithm; Third, an enclosed-cavity with one flexible wall was adopted to investigate active structure acoustic control. Numerical results demonstrate that the application of piezoelectric materials on control of the acoustic radiation is rational and efficient in the low frequency range.