单轴旋转惯导纬度误差和航向误差关联性分析

Correlation Analysis Between Latitude Error and Heading Errorof Single-axis Rotation Strapdown Inertial Navigation System

为实现舰船单轴旋转惯导航向误差海上动态评估,考虑单轴旋转惯导纬度误差和航向误差都是在相同误差源作用下的惯性导航解算输出结果,通过研究引起单轴旋转激光陀螺惯导航向误差和纬度误差的机理,建立了单轴旋转惯导纬度误差与航向误差之间的关联性模型。仿真分析验证了单轴旋转惯导纬度误差与航向误差之间关联性分析的正确性。基于二者之间的关联性,在无外界参考航向信息情况下,可实现海上舰船单轴旋转惯导航向误差实时动态评估与补偿,对提升舰船武器系统作战效能具有重要的实用价值。

In order to realize the dynamic evaluation of the heading error of the ship’s Single-axis Rotation Strapdown Iner⁃tial Navigation System(SRSINS)at sea,the correlation model between latitude error and heading error of SRSINS is estab⁃lished by studying the mechanism of heading error and latitude error,considering that the latitude error and the heading er⁃ror of SRSINS are both output result of the inertial navigation solution under the same error source.The simulation analysis verifies the correctness of the correlation analysis between latitude error and heading error of SRSINS.Based on the corre⁃lation,the dynamic evaluation and compensation of the heading error can be realized without external reference heading in⁃formation,which is of great practical value to improve the combat effectiveness of the ship weapon system.