Design, Analysis, and Experiment on a Novel Stick-Slip Piezoelectric Actuator with a Lever Mechanism

被引:26
作者
Huang, Weiqing [1 ]
Sun, Mengxin [2 ]
机构
[1] Guangzhou Univ, Sch Mech & Elect Engn, Guangzhou 510006, Peoples R China
[2] Nanjing Inst Technol, Sch Mech Engn, Nanjing 211167, Peoples R China
关键词
piezoelectric actuator; lever mechanism; analytical model; stick-slip frication; LINEAR-ACTUATOR;
D O I
10.3390/mi10120863
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
A piezoelectric actuator using a lever mechanism is designed, fabricated, and tested with the aim of accomplishing long-travel precision linear driving based on the stick-slip principle. The proposed actuator mainly consists of a stator, an adjustment mechanism, a preload mechanism, a base, and a linear guide. The stator design, comprising a piezoelectric stack and a lever mechanism with a long hinge used to increase the displacement of the driving foot, is described. A simplified model of the stator is created. Its design parameters are determined by an analytical model and confirmed using the finite element method. In a series of experiments, a laser displacement sensor is employed to measure the displacement responses of the actuator under the application of different driving signals. The experiment results demonstrate that the velocity of the actuator rises from 0.05 mm/s to 1.8 mm/s with the frequency increasing from 30 Hz to 150 Hz and the voltage increasing from 30 V to 150 V. It is shown that the minimum step distance of the actuator is 0.875 mu m. The proposed actuator features large stroke, a simple structure, fast response, and high resolution.
引用
收藏
页数:18
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