超磁致伸缩驱动微定位平台的动态特性研究

针对超磁致伸缩驱动器(Giant Magnetostrictive Actuator,简称 GMA)磁滞非线性和动态特性难以精确描述的问题,以基于GMA的二自由度精密微定位平台为对象,对其进行磁滞非线性和动力学建模并仿真分析。根据Jiles-Atherton磁滞模型、磁致伸缩模型、磁滞非线性圧磁方程和驱动器的结构动力学原理,建立了组合的微定位平台磁滞非线性动态模型；通过模型计算出输出位移的大小；另外对四种数学模型进行动态特性仿真分析。研究结果表明:仿真位移曲线与实验测得输出位移曲线基本一致,验证了所建模型的正确性；且优化了系统的设计参数,对改善GMA的动态性能和稳态输出性能提供了依据。

Research on Dynamic Characteristics of Giant Magnetostrictive Actuation Micropositioning Platform

In order to solve the problem that the hysteresis nonlinearity and dynamic characteristics of Giant Magnetostrictive Actuator (GMA) were difficult to accurately describe, the two-degree-of-freedom precision micro positioning platform based on GMA was used as the object, the hysteresis nonlinearity and dynamics modeling and simulation analysis were carried out. According to the Jiles-Atherton hysteresis model, the magnetostrictive model, the hysteresis nonlinear magnetic equation and the dynamic principle of the structure dynamics of the actuator, the combined micropositioning platform hysteresis nonlinear dynamic model was established. The output displacement was calculated by the model, In addition, the dynamic characteristics of the four mathematical models were simulated and analyzed. The results show that the simulation displacement curve is basically consistent with the output displacement curve measured by the experiment, and the correctness of the model is verified, and the design parameters of the system are optimized, which provides a basis for improving the dynamic performance and steady output performance of GMA.