摘要
在无法接收卫星信号的情况下,运动平台可利用地磁异常场来修正惯导误差,美国国家环境信息中心发布了分辨率为2′的全球地磁异常网格EMAG2。设计了基于EMAG2的惯导/地磁组合导航仿真系统,完成了位场延拓、地磁测量数据生成、运动模型求解等问题的研究。经仿真验证,对于不同精度的捷联惯导,采用地磁辅助后,位置误差最大值可控制在0.3~1.7个网格以内,位置误差均方根可控制在0.1~0.7个网格以内。
In some scenarios there are no navigation satellite signals,moving platforms can use geomagnetic anomaly field to correct their inertial navigation error.An overall scheme of simulation system for geomagnetic inertial integrated navigation based on EMAG2,which released by NOAA’s National Centers for Environmental Information with a resolution of 2′is proposed.Themes as magnetic field continuation,geomagnetic magnitude synthetizing,system modeling and solving are analyzed.The simulation results show that the maximum position error can be controlled within 0.3~1.7 grids and the root mean square error can be controlled within 0.1~0.7 grids for different precision strap-down INS assisted with geomagnetic grid.
作者
田峰敏
卞雷祥
王宏波
TIAN Fengmin;BIAN Leixiang;WANG Hongbo(Nanjing Institute of Technology,Nanjing 211167,China;Nanjing University of Science and Technology,Nanjing 210094,China)
出处
《弹箭与制导学报》
北大核心
2021年第2期10-14,共5页
Journal of Projectiles,Rockets,Missiles and Guidance
基金
国家自然科学基金(61871229)
南京工程学院高层次引进人才科研启动基金(YKJ201630)资助。
关键词
地磁异常场
组合导航仿真
自然邻点插值
geomagnetic anomaly field
integrated navigating simulation
natural neighbor interpolation
