基于场路耦合时步法的超磁致致动器动态特性  

Dynamic Characteristic of Giant Magnetostrictive Actuator Based on Field Circuit Coupling-time Stepping Method

作　　者：徐周翔[1] 蔡炯炯[2] 曹志彤[1] 

机构地区：[1]浙江大学电子与无线电物理研究所,浙江省杭州市310027 [2]浙江机电职业技术学院,浙江省杭州市310053

出　　处：《中国电机工程学报》2009年第33期129-134,共6页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50577057)~~

摘　　要：为研究超磁致致动器(giant magnetostrictive actuator,GMA)激磁电路的电感变化给动态特性带来的影响,分析超磁致材料(giant magnetostrictive material,GMM)的BH曲线随应力变化的内秉特性,建立GMA的电磁场、力场有限元模型和激磁电路集总参数模型,详述了在这2种模型之间以电感作为耦合参变量的场路耦合方法,并采用时步法进行GMA在不同电压下的动态特性分析。结果表明,该模型与电感作为常量的普通模型相比在时域特性上具有明显的非线性特征,在一定程度上解决了将电感作为常量处理带来的误差问题,为精细设计GMA提供了可借鉴的方法。In order to investigate the impact brought by the variable inductance in the excitation circuit on dynamic characteristic of giant magnetostrictive actuator （GMA）, the interior characteristic of BH curves of giant magnetostrictive material （GMM） with different stress was firstly reviewed. The finite element model of electromagnetic field and mechanical field and the lumped parameter model of excitation circuit of GMA were established. The field circuit couPling method was specified, which took the inductance as the coupling variable between these two kinds of model. And the GMA dynamic characteristic under different excitation voltage was analyzed using time stepping method. According to the analysis result, compared with ordinary model with invariable inductance, this model shows an obvious nonlinear characteristic. To a certain extent, it can solve the error problem which is brought by the invariable inductance and provide a method for precise designing for GMA.

关 键 词：超磁致致动器 电感 场路耦合 时步法 动态特性 

分 类 号：TP271[自动化与计算机技术—检测技术与自动化装置] TM359[自动化与计算机技术—控制科学与工程]