微振动控制中超磁致伸缩作动器的设计与分析

The design analysis for giant magnetostrictive actuator in the micro-vibration control

针对微振动控制中对作动器的要求,基于超磁致伸缩材料的特性对作动器进行了优化设计,通过对其进行磁路分析、热效应分析,验证了设计的合理性;针对超磁致伸缩材料的非线性性能,利用实验测量的主迟滞回线和一阶折返曲线数据点建立Preisach模型,采用输入校正迭代算法对非线性进行补偿,然后对作动器进行精密定位控制实验。实验结果表明,其位移控制误差小于0.3μm,且不超过总行程的1%,证明了该作动器的有效性、可行性,为其在微振动控制中的应用提供了可靠的保障。

According to the micro vibration control requirements,an actuator was designed for the micro-vibration control based on the characteristics of giant magnetostrictive material.Its magnetic circuit and thermal deformation were analyzed to verify its design rationality.Because of the nonlinear properties of giant magnetostrictive material,data of the measured hysteresis loop and the first retracing curve were used to build the Preisach model and the importing correct iterative algorithm was adopted to compensate its non-linearity.Precise position control experiments for the actuator were carried out.Experimental results show that the displacement control error is less than 0.3 μm and less than 1% of the total trip,demonstrating its effectiveness and feasibility.It shall provide a good support for the micro-vibration control.