• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2015, Vol. 51 ›› Issue (8): 185-190.doi: 10.3901/JME.2015.08.185

• 交叉与前沿 • 上一篇    下一篇

新型压电旋转驱动器的设计与性能测试

于月民, 冷劲松   

  1. 哈尔滨工业大学复合材料与结构研究所 哈尔滨 150001
  • 出版日期:2015-04-15 发布日期:2015-04-15

Design and Performance Testing of a New Type Piezoelectric Rotary Actuator

YU Yuemin, LENG Jinsong   

  1. Centre for Composite Materials and Structures , Harbin Institute of Technology, Harbin 150001
  • Online:2015-04-15 Published:2015-04-15

摘要: 为了降低压电旋转驱动器的成本,提高承载能力,实现分辨率可调,设计研制一种新型压电旋转驱动器。驱动器采用单个压电堆栈作为原动件,经二级位移放大机构将压电堆栈的变形进行放大,再通过运动转换将放大后的直线运动转化为棘轮转子的旋转转动。制作了压电旋转驱动器样机,对其进行试验测试。试验结果表明:驱动器的输出转角具有很好的可控性,当驱动电压分别为200 V、350 V和650 V时,可获得三种稳定的单步输出转角,旋转分辨率为0.034 9 rad,最大承载扭矩为0.392 N•m。频率为20 Hz时,最大运转速度为2.094 4 rad /s。该驱动器在降低成本的同时,还具有分辨率可调、运转速度较高和承载能力强的优点,在精密驱动和大转角驱动领域有较大的应用潜力。

关键词: 分辨率, 位移放大, 旋转驱动器, 压电堆栈

Abstract: A new type piezoelectric rotary actuator is designed and developed to reduces the cost, improve the carrying capacity and adjust resolving capacity. The actuator adopts single piezoelectric stack as the prime driver. With two displacement amplifications, the deformation of piezoelectric stack is amplified, then converted into ratchet rotor rotation with the movement transformer. A prototype of the piezoelectric rotary actuator is developed and the experimental test on the actuator is performed. Experimental results show that the actuator is excellent in controllability of output rotation angle.Three stable single step output rotation angles are obtained when the voltage is 200 V, 350 V and 650 V. The resolving capacity of it is 0.034 9 rad and the maximum carrying capacity is 0.392 N•m. The maximum rotation velocity is 2.094 4 rad/s, when the frequency is 20 Hz. The actuator offers a number of advantages, including low cost, adjustable resolving capacity and carrying capacity. It has application potential in the fields of precision driving and large rotation angle driving.

Key words: displacement amplification, piezoelectric stack, resolving capacity, rotary actuator

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