弯振复合型螺杆式压电驱动器研究

Research on Screw Piezoelectric Actuator Using Bending Vibration Transducer

为了提高压电驱动器的机械输出性能,便于压电驱动器振动能量的传输,研制了一种弯振复合型螺杆式压电驱动器。该驱动器由圆筒和两个弯振夹心式换能器组成,换能器由变幅杆和两组弯振压电陶瓷片组成,且变幅杆和圆筒采用一体结构。对驱动器的工作原理进行了分析,利用有限元法对换能器进行了仿真,实现了换能器两个振动模态特征频率的匹配。对驱动器的基本输出特性进行了测试,测试结果表明该驱动器的螺杆最大输出速度为0.62mm/s,最大输出力为1.8 N。

In order to improve the mechanical performance and energy transmission efficiency of piezoelectric actuator, a screw piezoelectric actuator using bending vibration transducer was proposed. The actuator was composed of a cylinder and two bending transducer. The transducer was made up of a amplitude and a pair of bending vibration piezoelectric ceramic plates, the amplitude and cylinder adopted a body structure. The actuator was simulated using finite element method based on the analysis of the working principle of the actuator, which realized the two bending vibration mode match well. The basic output characteristics of actuator were tested. The test results indicate the actuator of maximum speed of the screw is 0. 62 mm/s and the maximum output force is 1.8 N.