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应用科学学报 ›› 2002, Vol. 20 ›› Issue (4): 354-359.

• 论文 • 上一篇    下一篇

具有位移感知功能的超磁致伸缩微位移执行器的研究

贾振元, 杨兴, 王福吉, 郭东明, 郭丽莎   

  1. 大连理工大学机械工程学院, 辽宁大连 116023
  • 收稿日期:2001-10-23 修回日期:2002-01-06 出版日期:2002-12-31 发布日期:2002-12-31
  • 作者简介:贾振元(1963-),男,辽宁朝阳人,教授,博导;郭东明(1959-),男,河南温县人,教授,博导.
  • 基金资助:
    教育部高校博士点专项基金资助项目(2000014109)

A Study on the Giant Magnetostrictive Microdisplacement Actuator with a Displacement Sensing Function

JIA Zhen-yuan, YANG Xing, WANG Fu-ji, GUO Dong-ming, GUO Li-sha   

  1. School of Mechanical Engineering, Dalian University of Technology, Dalian 116023, China
  • Received:2001-10-23 Revised:2002-01-06 Online:2002-12-31 Published:2002-12-31

PDF

113

被引次数

32

摘要： 采用新型的功能材料——超磁致伸缩材料作为微位移器件,研制了一种具有位移感知功能的超磁致伸缩微位移执行器,并建立了其微位移闭环控制系统.提出了一种高分辨率、无摩擦、传感/位移传递一体化的圆形膜片式柔性结构,作为超磁致伸缩微位移执行器的微位移传递和感知机构.应用薄板弯曲理论得出了相应的挠度、应变变化率的解析表达式及分布曲线,确定了微位移感知传感器的分布形式,实现了执行器的微位移感知功能.同时,对研制的具有位移感知功能的超磁致伸缩微位移执行器及其微位移闭环控制系统进行实验研究,结果表明:执行器的微位移感知灵敏度和系统的微位移闭环控制精度较高.

关键词: 超磁致伸缩, 微位移执行器, 感知, 柔性结构

Abstract: A giant magnetostrictive microdisplacement actuator which has the function of sensing its displacement and which uses a new type of functional materials (giant magnetostrictive materials) as its microdisplacement device has been developed. A microdisplacement closed-loop control system is also built. A kind of circular membrane flexible structure with high distinguishability, zero friction, and integrated sensing-transferring-displacement capability, is proposed to be used as a mechanism to transfer and sense the actuator's microdisplacement. The analysis formulas and the distribution curves of deflection and variance ratio of strain are obtained by using circular plate bending theory. On basis of this, the distribution of the sensors that sense the actuator's displacement is obtained, and the actuator's displacement-sensing function is realized. At the same time, experimental studies on the actuator and its microdisplacement closed-loop control system are carried out. The results show that the sensitivity of the actuator and the precision of the system's closed-loop control are improved.

Key words: giant magnetostriction, sensing, flexible structure, microdisplacement actuator

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