基于时间延迟的GPS辅助空中快速对准算法

Rapid In-flight Alignment Algorithm Aided by Time-delay GPS

目前动基座对准问题的解决方案大都基于惯性系,但这些方案需要存储导航期间惯性系矢量信息,且大都没有考虑时间延迟的存在。文中通过插值、外推的方法对GPS时间延迟进行补偿,然后通过机载动基座快速最优姿态矩阵(fast optimal attitude matrix,FOAM)对准算法进行快速空中对准。最后通过仿真表明,经过时间延迟补偿的对准结果明显优于未经过补偿的。

At present, the schemes of in-movement alignment mostly base on inertial coordinate, but these schemes need to store inertial vectors information in navigation process, and most of them do not consider the time delay. In this paper, the GPS time delay was compen- sated by method of interpolation, extrapolation, and then the in-flight alignment was finished through the airborne moving base fast optimal attitude matrix （FOAM） alignment algorithm. Finally, simulation results show that, the results after time delay compensation excel those without compensation.