极区飞行法向量惯性导航算法原理

为克服经典力学编排方案在高纬度地区无法定位定向的问题,提出了以地球坐标系为导航坐标系的法向量惯性导航力学编排方案。该方案采用法向量代替传统的经纬度坐标表示水平位置,适合于全球范围内进行导航。推导了法向量导航误差方程,可用于组合导航算法设计,从而对惯导误差进行校正,满足全天候长航时的导航要求。通过仿真验证了法向量导航算法误差特性,证明了该方案可以满足飞机在极区飞行时的需要,解释了飞跃极点时导航定位误差跳变的原因。

N-vector inertial navigation mechanization algorithm for transpolar aircraft

The classical mechanization working could not confirm its position and heading in the circumpolar latitude area.For overcoming this problem,the normal vector inertial navigation basing on earth-fixed frame is presented.This approach uses a normal vector instead of latitude/longitude to finish updating of position.It could achieve navigation requirement world-wide.The n-vector mechanization error equations are derived,which can be used in the design of integrated navigation systems.The simulation could test and verify the error characteristics of n-vector mechanization.The n-vector mechanization offers the solution to transpolar aircraft.The reason of the navigation error saltation near the pole area is explained.