Dynamic Peculiarity of Piezoelectric-Stack Displacement-Amplifying Actuator
In order to find out the dynamic peculiarity of piezoelectric-stack displacement-amplifying actuator, three methods: harmonic response analysis, impedance test and dynamic grating projection are used to analyze it. Experimental results indicate that the displacement-amplifying mechanism can provide large output torque; its response time is less than 0.3ms; its mutation time of displacement is less than 0.5ms, the fluctuation of displacement is less than 5um, and the change of displacement vs. voltage is linearity variety; its dynamic displacement is smooth, when discharging. After analyzing the actuator, some virtues of dynamic response peculiarity are shown: rapidly responding, tiny displacement fluctuates, fine displacement linearity, higher precision, large output torque, etc. Therefore it can be abroad applied in many micro-displacement control and drive systems, which need high precision and large displacement. Its application prospect is worth to expect.
Paul P. Lin and Chunliang Zhang
H. Jin et al., "Dynamic Peculiarity of Piezoelectric-Stack Displacement-Amplifying Actuator", Applied Mechanics and Materials, Vols. 105-107, pp. 504-510, 2012