地磁匹配导航算法研究

Research on Geomagnetic Matching Navigation Algorithm

针对基于点的地磁匹配导航算法一次定位时间太长,不能满足导航系统对实时性的要求的缺点,提出基于向量的地磁匹配导航算法,满足导航系统对实时性的要求。基于点的地磁匹配导航算法和基于向量的地磁匹配导航算法都是基于单点的匹配算法,这决定了它们有共同的缺陷:匹配结果可能不唯一。针对这一点提出基于MonteCarlo的地磁匹配导航算法,这种匹配算法是一种基于线的匹配算法,通过各个点之间的约束可以克服前面两种算法匹配结果不唯一的缺陷。针对每一种算法给出仿真结果。

Geomagnetic Matching Navigation Algorithm（GMNA） is an important factor to influence the navigation precision,to some extent GMNA determines the navigation precision.An excellent GMNA not only fulfils the precision demand but also the time.First,in this paper GMNA based on point is studied,which is unsatisfied with the real-time due to the long time of position.Addressed to the problem which exists in GMNA based on point,GMNA based on the vector is proposed,which is satisfied with the real-time needed to the navigation system.The former two navigation algorithms are both based on the single point,which makes them have the co-efficiency： the matching is not unique.Taking into account of this,the GMNA based on the Monte Carlo is brought out,which is on the basis of the line,and can overcome the efficiency by means of the constriction among the points.The simulation results are showed aiming at every GMNA.