超磁致伸缩驱动器驱动磁场仿真分析  

Simulation analysis on actuating magnetic field of magnetostrictive actuator

作　　者：王新华[1] 肖峰[1] 王思民[1] 马永超[1] 

机构地区：[1]北京工业大学机械工程与应用电子技术学院,北京100022

出　　处：《现代制造工程》2009年第2期11-14,共4页Modern Manufacturing Engineering

基　　金：国家自然科学基金资助项目(50675003);北京市自然科学基金资助项目(3072006);北京市教委科技发展计划资助项目(KM200710005012)

摘　　要：为了充分发挥超磁致伸缩驱动器的特性,提高超磁致伸缩驱动器驱动磁场的性能,通过采用电流励磁法,建立基于磁感应强度为控制变量的单层空心线圈、多层空心线圈和带超磁致伸缩棒的多层线圈的轴线磁感应强度数学模型,分析超磁致伸缩棒、线圈长度和线圈半径对驱动磁场的均匀性和驱动磁场大小的影响。仿真结果表明,减小超磁致伸缩棒与驱动线圈之间的气隙,能提高驱动磁场的线性度;在满足设计要求的范围内,增加线圈长度,减小线圈半径,能够提高驱动磁场均匀性;仿真结果对超磁致伸缩驱动器驱动磁场的设计提供了一定的理论依据。For taking good advantage of magnetostrictive actuator and improving its magnetic field characteristics, the magnetic induction intensity models of single coil-free, double coil-free and complex coil magnetic with giant magnetostrietive rod are set up by using method of current-exciting-magnetic field. The influence of the giant magnetostrictive rod, the length of the coil and the semi diameter of the coil on the magnetic field uniformity are analyzed. The results of simulation show that the lineafity of actuating magnetic field can be improved by reducing the air gap between giant magnetostrictive rod and coil, and that the uniformity of actuating magnetic field can be improved by increasing the coil＇s length and reducing the coil＇s semi diameter to meet the design requests. This research provides definite theoretical evidences for designing actuating magnetic field.

关 键 词：超磁致伸缩驱动器 仿真分析 驱动磁场 磁感应强度 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]