基于横向地理坐标系的极区惯性导航方法研究

Inertial navigation algorithm in polar regions based on transverse geographic coordinate system

针对极区经线收敛导致以真北向作为航向参考的导航算法失效问题,提出了基于横向地理坐标系的导航参数定义和导航解算方法.该方法选取地球赤道上一点作为新的极点,并在地球模型为椭球模型情况下以该极点为基础定义了横向地球坐标系、横向地理坐标系以及横向经纬度,进而了设计并提出了将横向地理坐标系作为导航参考坐标系的惯性导航力学编排,仿真结果表明本方法解决了传统力学编排在极区不能正常工作的问题.

T he problem of inertial navigation in polar regions is that rapid convergence of the Earth′s meridians makes it difficult to establish true heading at high latitudes .To solve this problem ,an iner‐tial navigation algorithm based on transverse geographic coordinate system was presented .A point in traditional equator was selected as the new pole .According to this new pole transverse earth coordi‐nate ,transverse geographic coordinate ,transverse latitude and transverse longitude were defined . Then the mechanical equations were given in order to solve the problem of traditional inertial naviga‐tion in polar regions .