Simulation of geomagnetic matching algorithm based on correlation analysis for flying objects
基于相关分析的飞行器地磁匹配算法仿真研究

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.