高精度加速度计力矩器磁路的设计与仿真分析

力矩器磁路性能决定了加速度计标度因数的性能，为此利用有限元方法对力矩器磁路的磁通密度进行分析，在此基础上提出了两种结构优化设计方案，并对其进行仿真计算。仿真结果表明，改变导磁帽的形状可以提高气隙磁场的磁通密度的稳定性和均匀性，但导磁帽易出现饱和现象；通过降低磁钢的高度，同时增加导磁帽的高度，既能大幅度的提高磁场的稳定性和均匀性，导磁帽也不会出现饱和现象，但气隙磁场的磁通密度均值会降低37.25%，非线性误差为1.83%，优化后气隙磁场存在着磁通密度稳定（径向均值为0.42868T）和均匀的区域。

Design and Simulation Analysis for Magnetic Circuit of High Resolution Accelerometer

The performance of scale factor for accelerometer is determined by its torquer magnetic circuit. The magnetic flux distribution of torquer is calculated by finite element analysis. Then two optimized structures of magnetic circuit are presented. The results show, shape modification of conductive magnetic cap can improve stabilization and uniformity of magnetic flux while saturation flux density is exceeded. Magnetic field is stabilized and uniformed greatly by decreasing length of permanent magnet and increasing length of conductive magnetic cap while average of magnetic flux is reduced by 37.25%.The nonlinear error is 1.83%.Stable magnetic field exists after optimization.