磁致伸缩致动器的输出位移与输入电流频率关系实验研究_孙英.pdfVIP

2008 年 3 月 电 工 技 术 学 报 Vol.23 No.3 第23 卷第 3 期 TRANSACTIONS OF CHINA ELECTROTECHNICAL SOCIETY Mar. 2008 磁致伸缩致动器的输出位移与 输入电流频率关系实验研究 孙 英 王博文 翁 玲 黄文美 杨庆新 （河北工业大学电磁场与电器可靠性省部共建重点实验室 天津 300130 ） 摘要 针对设计的超磁致伸缩致动器（Terfenol-D 棒φ 10mm ×85mm ）进行了实验研究，主要 考虑具有偏置磁场和无偏置磁场时交流输入电流频率与位移输出特性之间的变化关系。通过对致 动器建立纵向振动方程，计算得到谐振频率应在 1.026～3.078kHz 和 1.660～4.980kHz 范围内。同 时实验结果表明谐振频率在2.2kHz 附近，与理论分析一致。谐振时致动器的位移输出最大可达 68μm ，且输入输出为倍频关系。实验研究揭示了超磁致伸缩致动器的频率域输入输出特性，为致 动器的优化与应用奠定了基础。 关键词：磁致伸缩 致动器 谐振 频率 中图分类号：TM274 Study of the Relationship Between Output Displacement and Input Current Frequency for Magnetostrictive Actuator Sun Ying Wang Bowen Weng Ling Huang Wenmei Yang Qingxin （Hebei University of Technology Tianjin 300130 China ） Abstract The magnetostrictive actuator is designed with an 85mm long by 10mm diameter cylindrical rod. And there is an experimental study of the varying AC input current (magnetic field) frequency on the displacement output characteristics for the actuator when with a bias magnetic field and without a bias magnetic field separately. Experimental data collected from the test device indicate that the measured resonance frequency peak is near 2.2kHz which agrees with the theoretical result. At the same time the maximum displacement of the actuator is 68μm and there is a double frequency relationship between the input current and output displacement. Vibration equations are built and computed to get the resonance range about 1.0261 ～3.0782kHz or 1.6600 ～4.980kHz. Through experiments, frequency-dependent behaviors of the actuator are investigated. Th