叠堆式超磁致伸缩致动器磁场分布建模及分析

发布时间：2018-04-05 21:29

本文选题：叠堆式超磁致伸缩致动器　切入点：磁场均匀性　出处：《光学精密工程》2017年09期

【摘要】：为提高超磁致伸缩致动器(GMA)偏置磁场的均匀度,设计了叠堆式超磁致伸缩致动器(SGMA),建立了SGMA的磁场分布模型,并对模型进行分析研究。首先,通过分析传统GMA偏磁施加方式的特点和不足,采用永磁体和GMM棒交替排布的结构形式,设计了SGMA;然后,将磁路模型和毕奥-萨伐尔定律相结合,建立了能够准确描述SGMA磁场特点的磁场分布模型;接着,利用所建立磁场分布模型分析了不同参数对SGMA磁场分布特征的影响,提出了SGMA结构设计方法;最后,通过实验完成了模型验证。结果表明:采用本文建立的模型描述SGMA磁场分布时,最大相对误差低于4%;在预测SGMA的输出位移时,最大相对误差低于5%。该模型有助于准确刻画SGMA的工作状态,提高SGMA的系统精度,并为SGMA结构设计提供参考依据。
[Abstract]:In order to improve the uniformity of the bias magnetic field of Giant Magnetostrictive Actuator (GMA), a stack Giant Magnetostrictive Actuator (GMA) is designed. The magnetic field distribution model of SGMA is established and the model is analyzed and studied.First of all, by analyzing the characteristics and shortcomings of the traditional magnetic bias method, the GMA is designed in the form of alternating arrangement of permanent magnet and GMM rod, and then the magnetic circuit model is combined with the Beo-Savart law.The magnetic field distribution model which can accurately describe the characteristics of SGMA magnetic field is established. Then, the influence of different parameters on the magnetic field distribution characteristics of SGMA is analyzed by using the established magnetic field distribution model, and the design method of SGMA structure is put forward.The model is verified by experiment.The results show that the maximum relative error is less than 4 when the model is used to describe the magnetic field distribution of SGMA and the maximum relative error is less than 5 when predicting the output displacement of SGMA.The model is helpful to accurately depict the working state of SGMA, improve the system precision of SGMA, and provide reference for the design of SGMA structure.
【作者单位】：军械工程学院车辆与电气工程系;
【基金】：国家自然科学基金资助项目(No.51275525)
【分类号】：TB381

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