Abstract
Due to the convergence of meridians in polar regions, the geography-based northern-azimuth mechanics arrangement has problems such as increase of error and computational overflow in polar navigation, and the traditional compass alignment scheme is unable to operate normally. In this paper, the problem in polar navigation is solved by using the mechanics arrangement scheme, and a simulated analysis has been carried out on the application of compass alignment in high latitudes through static data, which verifies that it is unable to operate normally at the pole. Then compass alignment has been replaced by anti-sloshing coarse alignment and a simulated verification has been conducted on its correctness. After that, the latitude increment method is used to convert the sports car data at low-latitude regions to high-latitude regions and carry out a semi-physical simulation, which further verifies the correctness of the grid inertial navigation and the coarse alignment method in anti-sloshing polar region.
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