航空学报 > 2014, Vol. 35 Issue (11): 3156-3165   doi: 10.7527/S1000-6893.2014.0121

射流伺服阀用放大型超磁致伸缩执行器建模及分析

朱玉川, 李跃松   

  1. 南京航空航天大学 机电学院, 江苏 南京 210016
  • 收稿日期:2014-05-04 修回日期:2014-06-10 出版日期:2014-11-25 发布日期:2014-06-25
  • 通讯作者: 朱玉川,Tel.: 025-84892503 E-mail: meeyczhu@nuaa.edu.cn E-mail:meeyczhu@nuaa.edu.cn
  • 作者简介:朱玉川 男, 博士,副教授.主要研究方向: 智能材料及其结构, 电液伺服控制. Tel: 025-84892503 E-mail: meeyczhu@nuaa.edu.cn; 李跃松 男, 博士研究生.主要研究方向: 智能材料及其结构, 电液伺服控制. E-mail: liyaosong707@163.com
  • 基金资助:

    国家自然科学基金(51175243,5080508);航空科学基金(20110752006, 20130652011);江苏省自然科学基金(BK20131359)

Modeling and Analysis for Amplified Giant Magnetostrictive Actuator Applied to Jet-pipe Electro-hydraulic Servovalve

ZHU Yuchuan, LI Yuesong   

  1. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • Received:2014-05-04 Revised:2014-06-10 Online:2014-11-25 Published:2014-06-25
  • Supported by:

    National Natural Science Foundation of China (51175243, 5080508); Aeronautical Science Foundation of China (20110752006, 20130652011); Natural Science Foundation of Jiangsu Province (BK20131359)

摘要:

为提高射流伺服阀的动态性能,设计了采用桥式微位移放大机构的射流伺服阀用放大型超磁致伸缩执行器(AGMA).建立了计输入位移损失的放大机构模型以及非线性位移输出理论模型,并采用有限元法对所建放大机构模型进行了对比验证,结果表明:放大机构的输入刚度模型最大误差<0.78 N/μm,放大倍数模型最大误差<0.22,放大倍数受输入位移影响较小.最后,试验研究了AGMA的静动态特性,结果显示:控制电流在-0.5 A到0.5 A缓慢变化时,AGMA输出位移约为78 μm;当控制电流从-0.5 A跃变到0.5 A时,其峰值位移约为71 μm,峰值时间约为0.014 s,调节时间小于0.1 s;当控制电流幅值为0.5 A时,其输出位移幅频宽>40 Hz,谐振频率约为30 Hz.

关键词: 超磁致伸缩执行器, 射流伺服阀, 动态模型, 微位移放大, 刚度, 有限元法

Abstract:

In order to improve the dynamic performance of a jet-pipe electro-hydraulic servovalve, a novel bridge-type micro-displacement amplified giant magnetostrictive actuator (AGMA) for a jet-pipe electro-hydraulic servovalve is presented. The models considering the input displacement loss are deduced to describe the input stiffness and amplification ratio of the amplified mechanism. Then, the nonlinear dynamic model of AGMA is obtained. The above-mentioned models of the input stiffness and amplification ratio are verified by finite element analysis. The results show that the maximum error of input stiffness is less than 0.78 N/μm, the maximum error of amplification ratio is less than 0.22, and the effect of input displacement on amplification ratio is small. Finally, the experiment results show that the output displacement of AGMA is 78 μm at the control current slowly changing between -0.5 A and 0.5 A. However, when the control current steps from -0.5 A to 0.5 A, the peak displacement of AGMA is 71 μm with the peak time about 0.014 s and the settling time less than 0.1 s. The bandwidth is more than 40 Hz and resonant frequency is about 30 Hz at the control current's amplitude of 0.5 A.

Key words: giant magnetostrictive actuator, jet-pipe servovalve, dynamic models, micro-displacement amplification, stiffness, finite element method

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