基于单点多模板序列匹配的组合导航方法  

A Single-Point Multi-Template Sequence Matching Based Integrated Navigation Method

作　　者：孙晓媛[1] SUN Xiao-yuan(Nanjing University of Aeronautics And Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学,江苏南京210016

出　　处：《计算机仿真》2022年第4期18-22,共5页Computer Simulation

摘　　要：针对地磁匹配导航中,因地磁数据库网格与INS参考轨迹存在较大位置误差导致的模板序列与位置序列不准确匹配,从而导致地磁匹配失效的问题,提出了一种基于单点多模板序列匹配的惯性/地磁组合导航方法。通过起点限制策略和标准差自适应调整方式对匹配算法进行了改进,考虑到匹配时刻所有可能的模板序列,通过多次匹配计算,能够获得较大的地磁匹配捕获概率。仿真结果与实验结果表明,该方法有效提高了组合导航系统的可靠性和定位精度。To solve the problem of the inaccurate matching between template sequence and position sequence,due to the grid error of geomagnetic reference database, in traditional geomagnetic matching navigation, an INS/geomagnetic integrated navigation method, based on the single-point multi-template sequence matching algorithm, is proposed, to improve the matching algorithm by starting point restriction strategy and standard deviation self-adaptive adjustment method, which takes into account all the possible matched template sequence at matching moment, and can obtain a larger geomagnetic matching probability through multi-matching calculation. Simulation results show that the method can improve the reliability and positioning accuracy of the INS/geomagnetic integrated navigation system.

关 键 词：地磁导航 地磁匹配 多模板匹配 组合导航 

分 类 号：V448.2[航空宇航科学与技术—飞行器设计]