Abstract:

The traditional attitude and heading reference system (AHRS) cannot provide reliable heading data in high-latitude areas. To address this problem, mechanization based on transverse coordinates for an AHRS is proposed for attitude and heading calculations. In terms of the requirements of accuracy evaluations in-high latitude areas, the relative specification evaluation method was employed to remove the adverse effect of latitude variance. Moreover, a scenario of a sailing trial for high-latitude navigation was designed, and a corresponding polar trial was carried out. The trial results showed that a fiber-optic gyro-compass using mechanization based on transverse coordinates could serve as a reliable AHRS in high-latitude areas.

Key words:

"> AHRS, polar navigation, evaluation method, transverse coordinate mechanization