Research on the piezoelectric ultrasonic actuator applied to smart fuze safety system

摘要

A novel linear-type piezoelectric ultrasonic actuator for application in a Smart Fuze Safety System (SFSS) is investigated in this paper. Considering the requirements of SFSS, the structural parameters of the piezoelectric ultrasonic actuator are initially determined. Furthermore, sensitivity analysis of the structural parameters to the frequency consistency is conducted using finite element (FEM) software. To validate the results of FEM, the frequency sweep tests of the piezoelectric ultrasonic actuator are performed to determine the stator's actual working mode frequencies with PSV-300-B Doppler laser vibrometer system. Additionally, the results of frequency sweep test are compared with that of the FEM analysis, and further verified by impedance analyzer. To investigate the overall performance of the piezoelectric ultrasonic actuator, vibration modes of actuator's stator, output speed and force of the piezoelectric ultrasonic actuator are tested. The experimental results show that the output speed and force of the actuator can reach 88.2 mm/s and 2.3 N respectively, which can meet the demands of the SFSS.