惯导系统导航精度评估通常采用蒙特卡罗法,计算量巨大,为此提出了基于环境函数矩阵的导航精度快速评估方法。利用环境函数矩阵建立了惯导系统设计指标和导航精度之间的联系,从而可实现对导航精度的快速评估,也可根据导航精度反推对惯导设计指标的需求。与传统的蒙特卡罗法相比,该方法避免了大量弹道仿真计算,具有计算量小、速度快的特点,在惯导产品选购及论证等方面具有重要实用价值。

Monte Carlo method is the normal method to assess the navigation accuracy of INS. To improve computing speed, a rapid assessment method of INS navigation accuracy was presented based on environment function matrix. The relation between design indexes and navigation accuracy can be built by the environment function matrix, based on which, the navigation accuracy can be assessed rapidly, and the design indexes can also be assessed according to the navigation accuracy requirement. The method is more rapid compared with Monte Carlo method which relays on large number of trajectory simulation, so it can be used to assess the performance of INS before choosing the INS products.