Vibration and jet-stream of a piezoelectric circular plate actuator

Synthetic jet technology is one of the hotest topic of active control technology in the hydromechanics field in recent decades. Synthetic jet actuator is the key device, and its active element is a piezoelectric layer. In this paper, the forced vibration of the circular piezoelectric composite plate is investigated by means of the energy method. A simplified dynamic equation which is similar to the single degree of freedom (SDOF) system is obtained. An equivalent damping parameter is introduced to correct the dynamic equation. Comparing with the experimental data, the theoretical results show a good accuracy when the driving frequency is lower than the resonant frequency. The performance of the circular piezoelectric composite plate vibrator is discussed.