捷联系统中静电陀螺仪电干扰力矩的研究

本文从静电陀螺捷联系统应用方案考虑,用有限元法分析我国现有结构静电陀螺空心转子离心变形,转子结构模型的内表面由赤道环、过渡圆和圆球面三部分组成,外表面为椭球面.按支承电极的实际情况,推导了全姿态读取时离心变形中高次谐波产生的电场干扰力矩的表达式.仿真结果表明,现结构静电陀螺仪组成捷联系统,高次谐波将严重影响系统精度的提高,必须在干扰力矩模型中予以补偿.

Research of Electric Field Disturbing Torque in Electrostatic Gyro Strapdown Navigation System

In this paper, the finite element method is used to analyze the centri- fugal deformation of the currently-used hollow spherical rotor used in electrostatic gyro. The mechanical construction of the rotor is that the inner surface is com- posed of the equator ring, smothing circle and sphere, and the outward surface is formed by ellipsoid. By considering the real electrode area, the formulas of electric field disturbing torgue are given. The simulation results show that high frequency harmonics will seriously affect the accuracy of ESG strapdown navigation system, so it must be compensated in the disturbing torque models.