新型二维压电移动机构-吉林大学学报.PDF

第 34 卷第4 期 Vol. 34 No.4 吉林大学学报(工学版) 2004 年 10 月 Journal of Jilin Ulliversity (Engineering and Technology Edition) Oct.200.. 文章编号: 1671 - 5497(2004 )04 - 0587 - 05 新型二维压电移动机构 华)1顶明，曾 平，王忠伟，程光明，杨志刚 (吉林大学机械科学与工程学院，吉林长春 130022) 摘 要:采用双压电晶片振子为移动机构的驱动源，提出可以实现二维平面移动的新型压电驱 动机构。分析了压电驱动机构的工作特点，探讨了实现驱动运动的工作机理。指出该机构是 通过控制机构驱动足产生的驱动力和接触面之间的摩擦力之差实现机构的定向运动的。设 计研制了新型二维压电移动机构的载物工作台实验装置，并进行了实验研究。实验证明该装 置可以实现沿规定方向的运动，并可以通过电路设计进行控制，且具有一定的承载能力。 关键词:自动控制技术;双压电片;二维移动;载物工作台;移动机构 中固分类号:TP242 文献标识码:A New planar locomotive device using bimorph HUA Shunming , ZENG Ping , W ANG Zhongwei , CHENG Guangmi吨， Y且也 Zhigang ( College of Mechanical Science and Engineering , Jilin University , Changchun 130022 , China) Abstract:A new type of the PZT driving device to realize the planar movement by using the bimorph oscil1ator as the driver was presented. The performance characteristic of the driving device was introduced and its working mechanism was discussed. It was revealed that the device realized the directional movement by control1ing the difference between the driving force of device leg and the friction force of interfaces. An experimental device of PZT locomotive carrying platform was developed and the tests were performed. Results proved that the device is real1y able to move directionally with allowable load under control of appropriately designed electric circuit. Key words: automatic control technology; bimorph; planar movement; platform; locomotive device 。引 压电材料属于陶瓷类材料，硬度高、脆性大，单纯压电材料元件变形量较小[1)。当将压电元件作为 驱动部件应用时，需要采用适当的方式放大变形量。常用的具有较大变形量的压电元件有压电叠堆元 件和压电双晶片元件两类。压电叠堆元件是利用多片压电晶片叠加，形成的变形量为多片叠加之和，产 生的力较大。但加工制作比较复杂，价格也比较高;压电双晶片元件是将压电晶片的长度伸缩变形量转 收稿日期:2004-05-12 基金