伺服阀用超磁致伸缩转换器驱动磁场的数值计算  

Numerical Calculation on Driving Magnetic Field of GMM Actuator for Servo Valve

作　　者：王传礼[1] 丁凡[2] 

机构地区：[1]安徽理工大学机械工程系,安徽淮南232001 [2]浙江大学流体传动及控制国家重点实验室,浙江杭州310027

出　　处：《兵工学报》2007年第9期1082-1086,共5页Acta Armamentarii

基　　金：国家自然科学基金资助项目(59835160);安徽省自然科学基金资助项目(070414268x)

摘　　要：介绍了利用国产超磁致伸缩材料(GMM)的电-机械转换器(GMA)工作原理,分析了GMA的驱动形式和磁路构成。在建立超磁致伸缩转换器的轴对称磁场数学模型的基础上,利用有限元方法对磁场进行数值计算,得到了不同输入电流时磁场分布和磁感应强度沿轴线的变化规律。实测了GMA不同输入电流时的磁感应强度,与有限元计算结果对比分析可以看出,两者虽有差异但基本相同,还论证了数学模型的正确性。研究结果对GMA磁场分布规律的预测及结构优化设计提供了理论依据。　The principle of the actuator with local GMM was proposed.The driving forms and magnetic circuits of GMA were analyzed.Based on the axial symmetric FEM model of the GMA,magnetic field was numerically computed with FEM method,and the laws of magnetic field distribution and magnetic induction strength alone axial line in different input currents were gained by using FEM method.The comparison of the magnetic induction strengths of GMA at different input currents between the measured and the calculated with FEM shows that the model is correct for both have almost identical result.And the results provide theoretical basis for the prediction of the magnetic field distribution and the further optimization design of GMA.

关 键 词：流体传动与控制 超磁致伸缩 电-机械转换器 有限元 磁场 

分 类 号：TH137.7[机械工程—机械制造及自动化] TB115[理学—数学]