伺服阀用超磁致伸缩致动器弓张结构设计与研究  

A design and study on the bow-type structure of a giant magnetostrictive actuator for servo valves

作　　者：郑佳伟 何忠波 李冬伟 荣策 杨朝舒 薛光明 ZHENG Jiawei;HE Zhongbo;LI Dongwei;RONG Ce;YANG Zhaoshu;XUE Guangming(Department of Vehicle and Electrical Engineering of Shijiazhuang Campus, Army Engineering University, Shijiazhuang 050003, China;Department of Mechanical Engineering, University of Auckland, Auckland 1010, New Zealand)

机构地区：[1]陆军工程大学石家庄校区车辆与电气工程系,石家庄050003 [2]奥克兰大学机械工程系

出　　处：《振动与冲击》2018年第24期30-37,共8页Journal of Vibration and Shock

基　　金：国家自然科学基金(51275525)

摘　　要：为满足电液伺服阀的驱动要求,解决超磁致伸缩制动器(GMA)体积大小与输出位移大小相互制约问题,提出了一种弓张结构用于GMA输出位移的放大;利用理论力学、材料力学理论,拉格朗日动力学方程及有限元仿真方法对弓张结构的动力学特性、位移放大倍数及其主要结构尺寸参数对位移放大倍数影响进行了分析;在上述基础上制作了弓张放大式GMA样机,搭建了试验测试系统,进行了正弦激励和扫频特性试验,完成了模型的验证。试验结果表明:正弦激励下,弓张结构的放大倍数在10. 3～11. 1波动,与理论计算值相吻合;扫频试验下,弓张放大式GMA最大波峰约在108 Hz处,与理论计算相符,其频带宽度可达到100 Hz,能够满足伺服阀输出特性要求。To meet the driving requirements of electro-hydraulic servo valves and solve the restriction between the size and the output displacement of the GMA,a bow-type structure was designed to amplify its output displacement.Through theoretical mechanics,material mechanics theory,the Lagrange’s dynamical equation and the finite element simulation method,the dynamic characteristics,displacement magnification of bow-type structure and the influence of its main structure size parameters on the displacement magnification were analyzed.The GMA with bow-type structure prototype was manufactured,the experimental system was established and the proposed model was verified by sweep and sinusoidal experiments.The results show that under sinusoidal excitation,the magnification of the bow-type structure fluctuated between10.3and11.1,which was in agreement with the theoretical calculation.Under the sweep test,the maximum peak of GMA with bow-type structure was about108Hz,which was consistent with the theoretical calculation,and its bandwidth could reach100Hz,which could satisfy the servo valve output characteristic requirement.

关 键 词：超磁致伸缩材料(GMM) 弓张结构 致动器 有限元仿真 伺服阀 

分 类 号：TP271.2[自动化与计算机技术—检测技术与自动化装置]