基于相关分析的飞行器地磁匹配算法仿真研究  

Simulation of geomagnetic matching algorithm based on correlation analysis for flying objects

作　　者：乔玉坤[1] 王仕成[1] 张金生[1] 王哲[1] 

机构地区：[1]第二炮兵工程学院,西安710025

出　　处：《地球物理学进展》2009年第2期721-727,共7页Progress in Geophysics

基　　金：国家自然科学基金项目(60572061)资助

摘　　要：匹配算法是进行飞行器地磁辅助制导研究的重要内容之一.通过理论分析和借鉴地形匹配算法,采用了基于相关分析的地磁匹配算法,并介绍了几种常用的相关分析方法.分析了飞行器地磁匹配制导过程中可能的噪声来源,确定了主要噪声的模型.以测量数据作为基准图,以测量数据叠加各种噪声模拟实时图,对各种相关分析方法进行了匹配仿真.根据仿真结果,讨论了各种相关分析方法对不同噪声的敏感程度、匹配长度变化对各种相关分析方法的影响以及各种相关分析方法对飞行器地磁匹配制导的适用性,为相关分析方法的选择和对匹配算法进行更深入的研究奠定了一定基础.The matching algorithm is one of the important research contents of geomagnetism-aided guidance for flying objects. The algorithm based on correlation analysis was adopted through theoretic analysis and using algorithm of terrain-aided guidance for reference, and the commonly used methods of correlation analysis were introduced. The sources of noises in geomagnetic contour matching for flying objects were analyzed and the models of main noises were established. Regarding the measured data as the reference map, and the reference map added models of noises the real map, simulations of algorithms through all kinds of methods of correlation analysis were done. The sensitivity degree of correlation analysis methods to noises, the effect of matching length on correlation analysis methods, and the applicability of correlation analysis methods to geomagnetism matching algorithm for flying objects were discussed according to the simulation results, which would offer a reference for the selection of correlation analysis methods and form a base for further deep studies on matching algorithms.

关 键 词：地磁场 匹配 制导 算法 仿真 相关分析 

分 类 号：P631[天文地球—地质矿产勘探]