超磁致伸缩致动器结构分析及输出力特性研究  

Structure analysis and output force characteristic study of giant magnetostrictive actuator

作　　者：鞠晓君[1] 林明星[1] 范文涛[1] 马高远[1] 

机构地区：[1]山东大学机械工程学院,济南250061

出　　处：《仪器仪表学报》2017年第5期1198-1206,共9页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(51475267)项目资助

摘　　要：在超磁致伸缩致动器(GMA)工作原理的基础上,完成了具有分段式偏置磁场和油冷散热系统的GMA机械结构设计;建立了GMA的3D模型,利用有限元分析软件对其磁场和温度场进行了仿真研究,结果表明分段式偏置磁场有较好的偏置效果,油冷散热方式冷却效果明显;搭建了GMA输出力特性测试平台,分别对直流激励下GMA的静态输出力特性和低频交流激励下动态输出力特性进行了研究;实验表明GMA的输出力与激励电流正相关,在直流激励下,输出力具有磁滞非线性,且受温度影响较大,受外部约束力影响较小;在交流激励下,输出力能很好地跟踪交流信号频率,未出现倍频效应,说明分段式偏置效果较好,GMA具有较高的精度和动态响应速度。Based on the working principle of giant magnetostrictive actuator （ GMA ）, a mechanical structure with segmented bias magnetic field and oil cooling system is designed. The 3D model of the GMA is established and its magnetic field and temperature field are simulated with finite element analysis software. The simulation results show that the segmented bias magnetic field method can obtain better bias performance, the oil cooling system can greatly lower the GMA＇ s temperature. A force test platform is set up, then the static and dynamic output force characteristics of the GMA are studied, respectively. The experimental results indicate that the output force has positive correlation with the driving current. Excited by DC, the output force of the GMA has hysteresis nonlinearity and is greatly influenced by the GMA＇ s temperature but slightly influenced by the external mechanical constraint force. Meanwhile, the GMA can accurately track the signals without double-frequency effect when driven by AC. This represents that segmented bias magnetic field has excellent bias effect, high precision and fast dynamic response speed.

关 键 词：超磁致伸缩致动器 分段式偏置磁场 油冷散热系统 仿真 输出力特性 

分 类 号：TH703[机械工程—仪器科学与技术]