摘要
载体进行地磁导航时,需要实时测量地磁场信息来进行导航及定位,然而,三轴磁测量仪自身误差的存在、载体自身的恒磁磁场以及软磁材料被外界磁场磁化而产生的感应磁场对实时磁测量值都会产生较大的影响。通过对三轴磁测量值分析研究,得出了测量值空间分布于椭球面的特点,在此基础上,通过特定的实验测量方法以及曲面拟合的最小二乘平差法求得补偿参数值。实验结果表明补偿方案有效可行,校准后的测量误差明显减少。
The carrier of geomagnetic navigation needs real-time measurement information of the geomagnetic field for naviga⁃tion and positioning.However,three-axial magnetic field measuring instrument exists errors itself,the carrier's own constant mag⁃netic field and induced magnetic field owing to carrier's soft magnetic materials magnetized by the external magnetic field have a greater impact on real-time magnetic measurement values all.Through the analysis of three-axis magnetic measurement values,the characteristics of the spatial distribution of ellipsoid are obtained.On this basis,the compensation parameter values obtained by spe⁃cific experimental methods and surface fitting method of least squares adjustment.Experimental result show that the compensation scheme is effective and feasible,after calibration measurement error is significantly reduced.
作者
嵇绍康
高艳丽
JI Shaokang;GAO Yanli(Department of Aviation Instrument and Electrical Control Engineering and Commanal,Qingdao Branch of Naval Aviation University,Qingdao 266041)
出处
《舰船电子工程》
2019年第12期43-47,共5页
Ship Electronic Engineering
关键词
地磁导航
恒磁磁场
感应磁场
椭球面
最小二乘平差法
geomagnetic navigation
constant magnetic field
induced magnetic field
ellipsoid
least squares adjust⁃ment method
