摘要
鉴于INS积累误差及TERCOM匹配算法机理缺陷对地磁匹配导航精度和可靠性的影响,提出了一种改进型的TERCOM匹配导航算法。分析了该算法的机理缺陷,将基于Hausdorff距离的匹配准则引入该算法中,提出了通过增加旋转变化、自适应确定最佳旋转角、实现适配序列精匹配的思想和算法,有效地提高了水下地磁匹配导航的精度和可靠性。通过实验验证了这种改进算法的正确性。
Considering the influences of the accumulation errors of inertial navigation system （INS） and the principle shortcoming of traditional terrain contour matching （TERCOM） algorithm for underwater geomagnetic matching navigation, an improved TERCOM method is presented. A new matching criterion based on the Hausdorff distance is used in the system algorithm. The improved TERCOM algorithm is analyzed by increasing the rotation change, determining the optimum rotation angle automatically, and getting the precision matching result in appropriate matching area, which obviously improves the accuracy and credibility of underwater geomagnetic matching navigation compared with to traditional TERCOM algorithms. The new algorithm is verified by experiments.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2009年第11期1320-1323,共4页
Geomatics and Information Science of Wuhan University
基金
国家863计划资助项目(2007AA12Z326)
