静电陀螺仪MUM全姿态读取的原理及其误差分析  

Principle of all-angle mass-unbalanced modulation reading in ESG and its error analysis

作　　者：郭晋峰[1] 糜长军[1] 金志华[1] 田蔚风[1] 

机构地区：[1]上海交通大学导航与控制研究所,上海200030

出　　处：《中国惯性技术学报》2006年第6期52-55,共4页Journal of Chinese Inertial Technology

基　　金：武器装备预研基金项目(51409030101JW03;51409060104JW0307)

摘　　要：研究了采用同步解调法实现静电陀螺仪质量不平衡调制(MUM)全姿态读取的原理,讨论了影响读取精度的因素,分析了各电极轴转子位移测量电路比例因子不一致和电极轴不正交造成的读取误差。研究表明,某轴测量通道1%的比例因子偏差将造成约17′的读取姿态误差,电极轴不正交造成的读取误差与不正交的程度约在同一数量级。应用中必须通过建立读取误差补偿模型,并进行实时补偿来提高MUM全姿态读取的精度。The paper studied the principle of the all-angle MUM(Mass-Unbalanced Modulation) reading realized through synchronous demodulation,discussed the factors that influenced the reading precision,and analyzed the reading errors resulted from the non-orthogonality of the electrodes-fixed frame and the inconsistent between the scale factors of different measuring channels.The results revealed that 1% deviation of scale factor in a certain axis would result in an angle error of about 17′,and the reading error caused by the non-orthogonal of the electrodes-fixed frame was at about the same level as the misalignment.In the applications,it’s necessary to improve the precision of the MUM's all-angle reading through building up compensation model and compensating the errors in real time.

关 键 词：静电陀螺仪 质量不平衡调制 全姿态读取 同步解调 读取误差 

分 类 号：U666.1[交通运输工程—船舶及航道工程]