改进的ICCP地磁匹配算法

本文在分析等值线约束迭代最近点(ICCP)匹配算法基本原理的基础上，针对ICCP算法在非刚性变换情形下，就难以取得理想匹配效果的情况，提出了改进的ICCP算法。该算法首先用ICCP匹配算法修正初始位置误差和航向误差，然后采用逐点匹配，再迭代该过程的方法，逐点修正位置误差。仿真实验表明，改进的ICCP算法能够实现准确定位，定位精度在一个网格精度以内。

Geomagnetic Matching Technology Based on Improved ICCP Matching Algorithm

In this paper, the principle of the matching algorithm ICCP is analyzed. When the real trace is a rigid transform from INS trace, the result using ICCP for matching is satisfying. This matching algorithm can correct the INS cumulative errors. But when the real trace is not a rigid transform from INS trace, the matching result is not satisfying. In order to resolve this problem a matching algorithm called Improved ICCP is put forward. In this algorithm, the matching result of ICCP is considered as the original INS trace. Then the matching algorithm of looking for matching point one by one is used to correct the INS cumulative errors and this is an iterative process. The matching algorithm is analyzed by simulation. The results show that the matching errors of the algorithm can be controlled in one gridding.