压电主动元件设计与实验研究  

Design and Experimental Research on the Piezoceramic Active Member

作　　者：叶青[1] 阎绍泽[1] 汤晓瑛[1] 郑凯[1] 

机构地区：[1]清华大学精密仪器与机械学系,北京100084

出　　处：《机械科学与技术》2003年第4期629-631,共3页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目 ( 5990 50 16 );清华大学机械工程学院重点研究基金资助

摘　　要：为自适应调节和改善空间结构动力学性能 ,利用压电材料的正逆压电效应 ,研制了一种具有传感和驱动双重功能的压电主动元件。该主动元件由压电驱动器、微位移传感器、压力传感器等组成 ,具有输出和实时检测微位移和力的功能。提出了压电主动元件的设计理论 ,并给出其工作机理及组成结构。针对其关键部件——压电驱动器进行了静态实验研究 ,包括位移输出情况、重复精度和稳定性实验。实验结果表明该驱动器输出位移可达 63 .2 μm、重复精度± 0 .0 5μm、稳定性 <0 .1μm。A piezoceramic active member with a sensor an d an actuator was developed to adaptively adjust and improve the dynamic performan ce of deployable structures based on the inverse piezoelectric effect of piezoce ramic material. The active member was made up of a piezoceramic actuator, a micr o-displacement sensor and a pressure sensor, having the function to output and detect micro-displacement and forces. The design method of the active member wa s presented. A simple experiment was performed on the piezoceramic actuator -- one of the key components of the active member. The experiment results show that the output displacement of the actuator can reach 63.2 μm, the repeatability i s about ±0.05 μm and the bsolute positioning accuracy is about 0.1μm. The act ive member can be used in micro-positioning control of the space deployable str uctures.

关 键 词：主动元件 压电材料 空间结构 驱动器 

分 类 号：TB12[理学—工程力学]