中文摘要：

针对惯性导航系统（INS）极区航向、速度误差增大和大圆航线航向角快速改变的问题,提出了一种INS极区导航参数解算方法.首先研究了极区INS误差抑制机制,构建了椭球面栅格航向基准模型,然后利用INS解算的导航参数信息,实现了栅格航向和栅格速度解算,最后完成了极区导航参数导航性能评估.理论分析和仿真结果表明,该方法计算简单,解算的导航参数有利于极区航行监控和航行绘算;栅格航向和速度精度明显优于地理航向和速度精度,可以满足极区载体航行需求,提高了INS极区导航性能.

英文摘要：

To solve the problems that heading error and velocity error of inertial navigation system （INS） increase and the heading angle of the great circle route changes rapidly in polar regions, a calculating meth od of polar navigation parameters for INS was proposed. First, the polar heading error restraint mecha- nism was studied and a ellipsoid grid heading reference model was built. Then, the calculating of grid heading and grid velocity was implemented using the calculating navigation parameter information of INS. Finally, the polar navigation per{ormance evaluation of the method was completed. Theoretical analysis and simulation results show that the calculating method is simple, the calculating navigation parameters are conducive to polar sailing monitoring and plotting, and the precision of grid heading and velocity is superior to that of the geographic heading and velocity, which illustrates that the method could meet the requirement of polar navigation and improve the polar navigation performance of the inertial navigation system.