东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2010, Vol. 31 ›› Issue (2): 245-248+288.DOI: -

• 论著 • 上一篇    下一篇

基于实验的超磁致伸缩微致动器动力学特性分析

李东;袁惠群;   

  1. 东北大学机械工程与自动化学院;东北大学理学院;
  • 收稿日期:2013-06-20 修回日期:2013-06-20 出版日期:2010-02-15 发布日期:2013-06-20
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(10772043);;

Experiment-based analysis of dynamical characteristics of giant magnetostrictive actuator

Li, Dong (1); Yuan, Hui-Qun (2)   

  1. (1) School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110004, China; (2) School of Sciences, Northeastern University, Shenyang 110004, China
  • Received:2013-06-20 Revised:2013-06-20 Online:2010-02-15 Published:2013-06-20
  • Contact: Yuan, H.-Q.
  • About author:-
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摘要： 基于超磁致伸缩微致动器实验所得的激励电流-磁致伸缩材料轴向位置-磁场强度三者之间的关系式,修正了厚壁线圈轴向电流-磁场理论公式.利用修正公式对超磁致伸缩微致动器动力学模型进行理论分析,得到了微致动器的振动响应;分析了修正系数、偏置磁场及预压应力对微致动器的影响.结果表明:修正系数对微致动器动力学特性影响十分明显,当修正系数K′=1.24时,基于实验拟合函数与基于厚壁线圈电流-磁场理论公式所得到的微致动器的输出位移与输入激励电流之间的滞回环完全吻合;微致动器振动响应具有明显的非线性特性,而且修正系数对其影响很大.偏置磁场与预压应力对微致动器的幅频特性影响也十分明显.

关键词: 超磁致伸缩微致动器, 滞回特性, 非线性, 解析解, 实验曲面拟合, 幅频特性

Abstract: Based on the relationship between the exciting current, axial position of giant magnetostrictive material and magnetic field intensity, which was obtained from the experiment of giant magnetostrictive actuator(GMA), the theoretical formula between the current along the axis of the coil around the thick-wall hollow column and magnetic field intensity was corrected. With the corrected formula used, the dynamical model of GMA was analyzed theoretically to get the vibration responses of GMA. Then, the effects of correction factors, bias magnetic field and pre-compression stress on GMA were discussed. The results indicated that the correction factors affect the dynamical characteristics of GMA greatly, e.g., if the correction factor K′=1.24, the hysteresis loops between output displacement and input exciting current that obtained by the experimental fitting function and the theoretical formula as above match perfectly. The vibration responses of GMA have distinct nonlinear characteristics and they are affected greatly by correction factors. Meanwhile, the bias magnetic field and pre-compression stress have distinct influence on amplitude-frequency characteristics of GMA.

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