基于平面导航系的极区传递对准算法研究

针对极区经线快速收敛导致基于传统导航坐标系的传递对准模型和误差方程不适用的问题,提出了基于平面导航力学编排的极区传递对准算法,并设计了"速度+姿态"匹配的传递对准滤波模型。该算法基于Kalman滤波最优估计理论,利用舰艇主惯导高精度姿态、速度信息对局部基准姿态失准角进行估计补偿,以达到局部基准极区动基座条件下快速初始对准的目的。仿真结果表明,在中海况条件下,局部基准可在20s内完成方位精度为5′、水平姿态精度为3′的初始对准。

Polar Transfer Alignment Research Based on Planar Navigation

Since rapid convergence of the Earth＇s meridians, the transfer alignment model and equations based on the tradi- tional geographic coordinate system were no longer applicable. To solve this problem, a polar transfer alignment algorithm based on planar navigation coordinate system was employed in this paper. And a ＂velocity and attitude＂ matching Kalman Filter was designed to estimate the misalignment angle of the strapdown attitude reference （SAR）, used of the precision atti- tude and velocity information of the Master INS. The simulation results show that SAR could achieve 5＇ alignment accuracy of yaw and 3＇ alignment accuracy of level attitude in less than 20 s in intermediate sea conditions.