轴向开槽对改善超磁致伸缩材料线性度影响的研究  

Axial Grooves for Reducing Non-Linearity of Giant Magnetostrictive Material(GMM) Rod

作　　者：唐兴龄[1] 陶华[1] 司朝润[1] 张杰[1] 

机构地区：[1]西北工业大学中法联合虚拟设计与制造研究室,陕西西安710072

出　　处：《西北工业大学学报》2010年第4期559-563,共5页Journal of Northwestern Polytechnical University

摘　　要：磁致伸缩应变与磁场关系的非线性,影响了磁致伸缩控制元件的精度和稳定性。文章针对这一问题,在超磁致伸缩式微小型高速开关阀驱动部件设计基础上,提出了沿超磁致伸缩棒(GMM)轴向开槽的方法来改善GMM部件的工作性能。通过对轴向开槽前后GMM棒内部磁场强度和焦耳热分布的数值计算,分析了轴向开槽对改善磁场强度的分布和减少热损耗功率的影响,通过对GMM棒开槽前后伸缩量的测试,验证了开槽可以明显改善超磁致伸缩材料组件的非线性。The nonlinear relationship between the magnetostrictive strain and the magnetic field affects the precision and stability of a magnetostrictive actuator.This paper proposes using four axial grooves along the GMM rod to improve the magnetostrictive actuator＇s performance.Section 1 of the full paper presents certain calculations for the GMM rod in a valve driver with or without axial grooves.Subsection 1.1 deals with the calculation of the intensity distribution of magnetic field;subsection 1.2 deals with the calculation of thermal power dissipation.Section 2 explains the experimental work;Fig.6 shows our experimental setup;Figs.7 and 8 present our experimental results for the GMM rod with or without axial grooves.The experimental results and their comparison show preliminarily that the four axial grooves reduce significantly the nonlinearity of the GMM rod.

关 键 词：磁致伸缩 磁场强度 线性度 

分 类 号：TP211.53[自动化与计算机技术—检测技术与自动化装置]