作者：吴凤贺, 张琦, 潘孟春, 陈棣湘, 万成彪, 刘中艳
作者单位：国防科学技术大学机电工程与自动化学院, 湖南 长沙 410073
关键词：地磁导航;等值线最近点迭代;矢量匹配;误匹配
摘要：
针对基于等值线最近点迭代（ICCP）的地磁匹配算法在地磁总量特征相似区域应用时存在的误匹配问题，提出基于ICCP的地磁矢量匹配算法。该算法利用地磁矢量测量信息与匹配区域的矢量地磁图，采用三分量差异寻找地磁等值线附近的最优参考路径，进而求解刚性变换矩阵，通过刚性变换实现惯导指示路径的误差校正。仿真分析传统标量ICCP算法存在明显误匹配的情况及该情况下矢量匹配算法的校正效果，同时对比标量算法可以实现正确匹配情况下矢量算法的匹配效果。结果表明：基于ICCP的地磁矢量匹配算法不仅能够解决传统标量算法存在的误匹配问题，而且相对于标量算法具有更高的定位精度。
Study on geomagnetic vector matching algorithm based on ICCP
WU Fenghe, ZHANG Qi, PAN Mengchun, CHEN Dixiang, WAN Chengbiao, LIU Zhongyan
College of Mechatronics Engineering and Automation, National University of Defense Technology, Changsha 410073, China
Abstract: Aiming at the mismatch problem of the geomagnetic matching algorithm based on iterative closest contour point(ICCP) in the region with similar scalar magnetic field characteristics, the geomagnetic vector matching algorithm based on ICCP is proposed. The algorithm utilizes the geomagnetic vector measurement information and the geomagnetic vector map in the matched region, as well as uses the three-component difference to get the optimal reference path near the geomagnetic contour. Then, the rigid transformation matrix is obtained and the error calibration of the inertial guidance path with the rigid transformation is realized. Simulative analysis is carried out for the situation that the traditional scalar ICCP algorithm has obvious mismatch and the calibration performance of the vector matching algorithm in this case. In addition, the matching performance of the vector algorithm is compared with the scalar algorithm that matches correctly. The results show that the geomagnetic vector matching algorithm based on ICCP can not only solve the mismatch problem but also have better match performance.
Keywords: geomagnetic navigation;iterative closest contour point(ICCP);vector matching;mismatching
2018, 44(2): 103-107 收稿日期: 2017-07-15;收到修改稿日期: 2017-09-02
基金项目: 国家自然科学基金（51507178，U1430105）
作者简介: 吴凤贺(1993-),男,北京市人,硕士研究生,专业方向为电磁测量与传感。
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