基于惯性冲击的磁致伸缩电机及其运动性能

为提高惯性冲击电机的定位精度,提出了一种滑动式超磁致伸缩惯性冲击电机,该电机采用了一种简洁的非钳位式结构。为了对电机的位移输出进行有效预测,采用Jiles-Atherton二次畴转模型对惯性冲击电机进行了动力学建模分析,并进行了仿真计算。此外还搭建了实验系统,对电机在不同工作频率、驱动电流下的运动性能进行了实验。实验结果表明,所建模型能够准确地预测电机的步长及运动速度。所设计的电机工作频率可达到100Hz,正/反向行进速度可达1.1mm/s,分辨率(最小步长)为0.015μm。电机正反运动对称性好,且具有良好的线性度,可实现精确定位。

Magnetostrictive motor and its motion behavior based on impact drive principle

To improve the positiong presition of the impact drive mechanism(IDM), a sliding giant magnetostrictive material impact drive mechanism with non-clamped structure was presented in this paper. To estimate the displacement of IDM, dynamics modeling was performed based on Jiles-Atherton model, and the simulation was realized by Matlab/Simulink software. Therefore, an experimental equipment has been built to test the working performance of IDM. The experimental results illustrate that the proposed model can forecast the displacement of IDM, and the working frequency can reach to 100Hz, the maximum speed of forward and backward direction is 1.1mm/s, and the minimum step size (resolution rate) is 0.015μm. The proposed IDM has good linearity and symmetrical characteristic for motion performance and can achieve precision positioning.