摘要
设计了一种包含3根Terfenol-D棒的磁致伸缩作动器,并根据电磁学原理,在对磁致伸缩作动器内部磁路分析的基础上推导出了作动器输出位移与Terfenol-D棒的长度以及上下端盖的尺寸之间的关系,以此为根据对作动器进行结构优化以使其结构更加紧凑。通过ANSYS仿真表明:由于螺线管和上下端盖组成了闭合磁路,大大改善了螺线管端部的磁场分布情况,同时由于采用热膨胀抵消补偿法克服了温度对作动器输出位移的影响,从而最大限度地消除了作动器输出的非线性。
A compact magnetostrictive actuator consisting of three Terfenol-D rods and surrounded by a magnetic coil was designed, which is more energy efficient. Based on electromagnetism principles, the relation of the actuator output with the length Terfenol-D rod, the size of the top end plate and the bottom end plate was derivate by analyzing the magnetic flux path of the actuator. The structure of the actuator was optimized. The simulation results with ANSYS show that the distribution of magnetic field in the magnetic coils is improved attributing to the closed magnetic flux path, which is composed by the Terfenol-D rods, the top end plate and the bottom end plate. The affection of the temperature is eliminated by the compensation of the thermal expansion, so that the nonlinearity of the actuator output is minimized.
出处
《机床与液压》
北大核心
2009年第5期48-50,114,共4页
Machine Tool & Hydraulics
关键词
作动器
磁致伸缩材料
非线性
结构优化
热变形
ANSYS
Actuator
Magnetostrictive material
Nonlinearity
Configuration optimization
Thermal expansion
ANSYS
