多导弹协同惯性导航系统误差修正及精度分析

Cooperative Inertial Navigation System Error Correction and Accuracy Analysis of Multi-missiles

针对飞航导弹的惯性导航系统(INS)单独使用时存在位置和速度估计误差发散的问题,在不需要弹目距离信息或高度表信息或空速管信息的前提下,提出了一种基于INS信息、前视装置提供的导弹相对于已知地标的视线角和视线角速率信息及通过弹载数据链获得的各枚导弹之间的一维相对距离信息的多导弹(不少于3枚)协同INS误差修正方法。在此基础上,分析了参与协同误差修正的各枚弹相对于地标的几何构形对INS误差修正精度的影响,推导得到了水平精度因子(HDOP)和高程精度因子(VDOP).最后仿真验证了该方法的有效性和结论的正确性。

In absence of other navigation systems, the inertial navigation system （INS） error of cruise missile will cumulate continuously with time. A novel INS error estimation method for multiple cruise missiles （ at least 3 missiles） is proposed, which is based on the passive observation to feature target and the distance information between missiles and INS information without needing of distance information between cruise missile and feature target or altimeter information or airspeed information. Then the influence of geometrical configuration between cruise missile and the feature target on the INS error correction precision is analyzed, and the horizontal and vertical dilutions of precision are deduced, respectively. Finally, the simulation results prove that the validity of the method and the correctness of the conclusion.