摘要
地磁匹配算法是地磁导航的核心,地磁匹配结果既可以作为组合滤波的观测输入,也可以直接作为系统定位的结果输出。本文简要介绍了地磁场特征及地磁匹配的基本原理,提出以Hausdorff距离为相关度量准则的地磁匹配算法,给出算法流程图,并以实测地磁数据为匹配基准图进行仿真试验,试验结果表明:匹配算法可达到较高的精度,同时通过适当选取匹配区域和匹配序列长度,可以进一步提高地磁匹配的效率和定位精度。
Geomagnetic matching algorithm is the core of geomagnetic navigation.The geomagnetic matching results can be used as observed input of combined filter,also directly as the output of system location results.The geomagnetic field characters and basic principle of geomagnetic matching are introduced briefly.With Hausdorff distance as similarity measure criterion and measured data as geomagnetic reference map,a geomagnetic matching algorithm is introduced,and detailed flow chart is presented.Simulation results show that the matching algorithm has high precision,and matching efficiency and location precision can be improved properly through choosing matching sequence length and matching region.
出处
《航空兵器》
2011年第4期26-29,共4页
Aero Weaponry
