地磁导航中磁测姿态解算误差分析  

Error Analysis of Magnetic Attitude Measurement System on Geomagnetic Navigation

作　　者：龙达峰[1] 刘俊[1] 张晓明 李杰[1] 

机构地区：[1]中北大学仪器科学与动态测试教育部重点实验室,太原030051

出　　处：《科学技术与工程》2015年第6期204-209,共6页Science Technology and Engineering

基　　金：国家自然科学基金(61004127)资助

摘　　要：在弹载地磁导航应用中,磁测姿态系统解算精度受不同误差源的影响。为提高磁测精度,根据误差理论对磁测系统进行了误差机理分析与建模;建立了偏航误差、地磁分量误差和传感器测量误差的误差传递关系,为传感器选型及后续误差补偿提供理论参考。仿真结果表明,各误差间的传递关系呈现非线性关系,在全射向范围内误差以零度俯仰角为成中心对称分布规律。此外,若弹体靠近或沿着地磁方向飞行时,都会出现很大的解算误差,甚至于方程无解。因此有针对的避开上述飞行方案,能提高磁测姿态解算精度。In the application of the missile-borne geomagnetic navigation,the attitude accuracy of magnetic measurement system（ MMS） is influenced by various errors. To improve the measuring precision of the MMS,the error models of MMS itself are established based on the error theory. Then the error transfer relationships about yaw error,geomagnetic component error and measurement error are analyzed. It provides theoretical reference for sensor selection and error compensation. The simulation results show that the error transfer relation is non-linear. In the range of shoot the error is center symmetric about zero pitch. In addition,if the missile flight near or along the geomagnetic direction,there is a large calculation error,even no solution. Therefore,to avoid the flight plan,the attitude calculation accuracy can be improved.

关 键 词：地磁导航 误差分析 误差模型 

分 类 号：TN911.6[电子电信—通信与信息系统]