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浙江大学学报(工学版)
J4  2011, Vol. 45 Issue (10): 1726-1731    DOI: 10.3785/j.issn.1008-973X.2011.10.005
    
Variable magnetic permeability self-sensing model of
GMM based on dynamic coil impedance measurement
ZHANG Lei, WU Yi-jie, LI Jia-qi, WANG Bin, LIU Xiao-liang
State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China
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Abstract  

A closed-loop controlling method utilizing magnetic induction of giant magnetostrictive materials (GMM) as feedback quantity was proposed in order to improve the accuracy and real-time performance of the giant magnetostrictive microdisplacement controlling system, which can additionally overcome the nonlinearity hysteresis in giant magnetostrictive micro-deformation controlling system. A self-oscillation circuit was applied in order to test the impendence of the measuring coil, and the variation of GMM magnetic conductivity were showed by the variation of self-oscillation voltage, then the magnetic inductions of GMM can be calculated out. The squared value of GMM magnetic conductivity has a continuous favorable linear relation with micro-displacements by a series of dynamic and static experiments with AC or DC currents applied on the driving coil.

Published: 01 October 2011
CLC:  TP 271  
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Cite this article:

ZHANG Lei, WU Yi-jie, LI Jia-qi, WANG Bin, LIU Xiao-liang. Variable magnetic permeability self-sensing model of
GMM based on dynamic coil impedance measurement. J4, 2011, 45(10): 1726-1731.

URL:

https://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2011.10.005     OR     https://www.zjujournals.com/eng/Y2011/V45/I10/1726


基于线圈阻抗动态测量的GMM自传感模型

为了提高超磁致伸缩微位移变形控制的精度与实时性,针对一般超磁致伸缩微位移控制中存在的迟滞非线性问题,提出将超磁致伸缩材料(GMM)的磁感应强度作为反馈量构成闭环控制系统的方法.通过谐振电路测量探测线圈动态阻抗的方式,使得探测线圈阻抗的变化反映GMM内部变化的磁导率,从而计算获得GMM的磁感应强度.实验结果表明,当交变电流或直流电流通入励磁线圈时,通过谐振电路测量探测线圈动态阻抗获得GMM的磁感应强度,其平方值与GMM微位移变形始终保持良好的线性关系.

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