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giant magnetostrictive ACTUATOR IN SERVO VALVE AND MICRO PIPE ROBOT

Chinese Journal of Mechanical Engineering 2005年第1期18卷 10-13页

作者： WangChuanli DingFan ZhangYongshun LiQipeng StateKeyLaboratoryofFluidPowerTransmissionandControl ZhejiangUniversityHangzhou310027China SchoolofMechanicalEngineering DalianUniversityofTechnologyDalian116024China

Performance of giant magnetostrictive material (GMM) is introduced. Principleof work, basic structure and key techniques of giant magnetostrictive actuator (GMA) are *** dynamic models of magneto-mechanical coupling are established. The structure and principle ofthe pneumatic servo valve and the micro pipe robot with new homemade GMM are presented. Theexperiment is carried out under typical working conditions. The experiment results show that the GMMpneumatic servo valve has wide pressure control characteristics, good linearity, and fast responsespeed. The movement principles of the GMM robot system are reliably feasible and its maximal movingspeed is about 8 mm/s. It is preferable to the driving frequency of the robot within 100 approx 300Hz.

关键词： giant magnetostrictive Actuator Servo valve Micro pipe robot

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Multi-physics coupling field finite element analysis on giant magnetostrictive materials smart component

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第5期10卷 653-660页

作者： Zhang-rong ZHAO Yiojie WU Xin-jian GU Lei ZHANG Ji-feng YANG State Key Laboratory of Fluid Power Transmission and Control Modern Manufacture Engineering Institute Zhejiang University Hangzhou 310027 China Department of Mechanical & Electronic North China Institute of Science and Technology Beijing 101601 China

This study presents a new method to solve the difficult problem of precise machining a non-cylinder pinhole of a piston using embedded giant magnetostrictive material (GMM) in the component. We propose the finite element model of GMM smart component in electric, magnetic, and mechanical fields by step computation to optimize the design of GMM smart com-ponent. The proposed model is implemented by using COMSOL multi-physics V3.2a. The effects of the smart component on the deformation and the system resonance frequencies are studied. The results calculated by the model are in excellent agreement (relative errors are below 10%) with the experimental values.

关键词： Smart component giant magnetostrictive Finite element method (FEM) modeling Non-cylinder piston pinhole Multi-physics coupling field

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Study on driving magnetic field and performance of GMA for nozzle flapper servo valve

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Journal of Coal Science & Engineering(China) 2007年第2期13卷 207-210页

作者：王传礼丁凡李其朋 Department of Mechanical Engineering Anhui University of Science and TechnologyHuainan 232001China State Key Laboratory of Fluid Power Transmission and Control Zhejiang UniversityHangzhou 310027China

The structure and principle of the GMM actuator and the new nozzle flapper valve with the GMA were presented. Based on the axis-symmetric FEM model of the GMA driving magnetic field was computed. And the field distribution for different input currents and variant curves of magnetic flux density along the axis were determined by using FEM. Magnetic flux density of the GMM actuator was practically measured under different input currents. The experiment of output displacement and frequency response of the GMM actuator was carried out under typical working conditions. The experiment results show that the GMA for nozzle flapper servo valve has bigger output displacement and quick response speed. And theoretical basis was presented to further introduce the GMA nozzle flapper valve into two stage electro-hydraulic servooo valve.

关键词： giant magnetostrictive actuator FEM servo valve

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A hybrid magnetostrictive-piezoelectric barrel-stave projector

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Chinese Journal of Acoustics 2006年第4期25卷 371-377页

作者： CHAI Yong MO Xiping LIU Yongping CUI Zheng Institute of Acoustics Chinese Academy of Sciences Beijing 100080 Graduate School of the Chinese Academy of Sciences Beijing 100029

A hybrid magnetostrictive-piezoelectric barrel-stave projector is designed and developed. The new type transducer is driven by the union of rare-earth giant magnetostrictive material Terfenol-D and PZT piezoelectric ceramic. Combining the advantages of low frequency performance within a compact size, it proves that the hybrid projector has a much broader band and higher sound power than that with single magnetostrictive or piezoelectric driver by the simulated and measured results. The prototype of the hybrid projector has a size of 88 mm in outside diameter and 316 mm in length, with an underwater resonant frequency of 1.30 kHz, Q factor of 1.43 for -3 dB bandwidth, and transmitting voltage response level of 135.1 dB at the resonant frequency.

关键词： resonant frequency giant magnetostrictive piezoelectric ceramic low frequency sound power the union new type

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