基于地磁方向熵的高空地磁匹配航迹选取方法  

High Altitude Geomagnetic Matching Track Selection Method Based on Geomagnetic Direction Entropy

作　　者：邓小波[1] 赵军瑞 宋胜 DEGN Xiaobo;ZHAO Junrui;SONG Sheng(Unit 61711,PLA,Kashi 844000,China;The 54th Research Institute of CETC,Shijiazhuang 050081,China)

机构地区：[1]中国人民解放军61711部队,新疆喀什844000 [2]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《无线电工程》2022年第5期840-845,共6页Radio Engineering

基　　金：国家部委基金资助项目。

摘　　要：针对高空地磁图等值线趋势变化明显现象,在对高空地磁图地磁梯度网格研究的基础上,提出了利用地磁方向熵来进行高空地磁匹配区域内航迹选择方法。该方法利用方向熵的数值来判断不同航向飞入轨迹的地磁匹配效果,从而得到最佳的匹配轨迹。应用半物理仿真的方法,在30000 m高空地磁图上选取了3条不同方向飞行轨迹,并对其匹配定位结果进行对比分析。仿真结果表明,依据地磁方向熵的值选择飞行轨迹可以有效地提高高空地磁匹配定位的精度,为高空地磁导航的路径规划提供依据。In view of the phenomenon that the trend of the contour lines of high altitude geomagnetic map changes obviously,a method of track selection in the high altitude geomagnetic matching region using the direction entropy of the geomagnetic map is proposed.This method uses the geomagnetic direction entropy to determine the geomagnetic matching effect in the direction of the fly-in track,so as to obtain the best matching track.Using the semi-physical simulation method,three flight tracks in different directions are selected on the geomagnetic map at the altitude of 30000 m,and the matching positioning results are analyzed.The simulation results show that the flight track selection according to the entropy of the geomagnetic direction can effectively improve the accuracy of matching positioning and provide a basis for the path planning of high-altitude geomagnetic navigation.

关 键 词：高空地磁图 地磁梯度网格 地磁方向熵 地磁匹配航迹选取 

分 类 号：V249.32[航空宇航科学与技术—飞行器设计]