磁悬挂天平俯仰电磁场的二维有限元分析

磁悬挂天平作为一种能够提供无支架干扰试验数据的新型风洞天平，在航空航天领域逐渐引起关注。为丁适应风洞试验对高精度数据的要求，有必要引入新的控制算法以进一步提高磁悬挂天平的控制精度，这就要求获得更为准确的天平电磁场模型及电磁场随模型姿态变化的分布规律。该文采用有限单元法对磁悬挂天平俯仰电磁场进行了二维分析，得到了电磁力随模型俯仰角度变化的规律以及俯仰角度一定条件下电磁力随电流强度变化的规律，并且在实验中对分析结果进行了验证，从而为磁悬挂天平的控制和校准提供参考。

The 2D Finite Element Analysis of MSBS Lifting Electromagnetic Field

As a kind of new wind tunnel balance, MSBS (Magnetic Suspension Balance System) becomes more remarkable in aeronautical and astronautical field, which can provide experiment data without the disturbance of brackets. To meet the tunnel experiments' requirement of high precision data, it's necessary to introduce new control methods to MSBS to improve the control precision, that means to acquire more exact electromagnetic field model of MSBS and the variable rule between electromagnetic field and the model's pose. This paper uses finite element analysis (FEA) theory to analyse the 2D MSBS lifting electromagnetic field and obtains not only the law between electromagnetic force and the model's lifting angle but also the law between electromagnetic force and current density under the same lifting angle, which have been proved in experiments. Result shows that it can give a foundation for improving the control and calibration of MSBS.