基于等值线搜索带的地磁匹配算法

针对TERCOM算法在地磁匹配应用中存在的不足,提出了基于等值线搜索带的改进匹配算法,将地磁基准图上的匹配搜索区域缩小到航迹起始点地磁测量值对应的地磁场等值线附近区域,从而减少匹配搜索时间和计算量.仿真实验结果表明,该算法在保证匹配精度的前提下,能够有效降低匹配计算时间,提高匹配算法的实时性.

Geomagnetic Matching Algorithm Based on Contour Search Zone

According to the fact that the insufficiency of traditional TERCOM algorithm in computation complexity and real-time, an improved matching algorithm based on contour search zone is proposed, in this new algorithm the search area for looking for best matching point is narrowed to a small zone which near the magnetic field contours that is corresponding to the geomagnetic measurements of starting point of flight track, and the tracks to be matched is gained by translating the flight track in the zone. The simulation results show that the matching algorithm based on contour search zone not only has accurate matching precision, but effectively reduces the computational complexity, accelerates the search speed and improves the real-time of matching algorithm.