基于向量搜索的地磁导航匹配算法  

Geomagnetic matching algorithm based on vector search

作　　者：任治新[1] 杨功流[2] 李士心[2] 

机构地区：[1]国防科技大学机电工程与自动化学院,长沙410073 [2]天津航海仪器研究所,天津300131

出　　处：《中国惯性技术学报》2008年第4期424-427,共4页Journal of Chinese Inertial Technology

基　　金："十一五"武器装备预研项目(51309060406)

摘　　要：对基于向量搜索的地磁导航匹配算法进行系统的研究,主要研究内容包括模型的建立、最优匹配位置的确定、搜索过程实现及优化、仿真实现等。仿真实现是基于航空实测地磁数据进行的,大量的匹配试验表明基于向量搜索的地磁导航匹配算法是可行的。仿真试验表明:该算法对初始位置误差要求低;不必对磁场做任何线性化假设,只要磁场变化特征明显既可;能求得全局最优解。同时该算法也存在运算量大、对方位和搜索步长敏感等缺点。The algorithm of the geomagnetic matching based on vector search was studied. The study was mainly about the data modeling, the best matching position, the searching process and optimization, the realization of simulate and so on. The simulations based on aeromagnetic data and experiments show that the geomagnetic matching algorithm based on vector search is feasible. According to the simulations, the algorithm has several advantages, e.g., be low requirement for initial position error, doesn＇t need linearization assumptions for geomagnetic field, only need obvious characters of geomagnetic field for match navigation, and can obtain the optimized global solution. Meanwhile, this algorithm exists some problems, such as powerful computing capacity and sensitive to azimuth and searching step-length.

关 键 词：惯性导航 地磁导航 向量搜索 匹配算法 

分 类 号：U666.1[交通运输工程—船舶及航道工程]