惯性导航系统定位精度与试验路径的关系

Relationship Between Location Precision of Inertia Navigation System and Test Path Form

给出了计算惯性导航系统定位坐标的简化公式,推导出了计算定位误差的数学模型,比较了战车沿直线、矩形及三角形3种特殊路径行驶情况下从一点到另一点绝对定位误差之间的关系,根据战车复杂行驶路径可以用小的直线段和小的三角形、矩形等特殊线段组合的特点,得出了在战车起止点确定的前提下惯性导航系统绝对定位误差与路径形状无关的重要结论,为制定科学严谨的惯性导航系统定位精度考核方案提供了理论依据。

Simplified calculation formula of location coordinate of inertia navigation system was presented, and the mathematic model of location error calculation was derived and introduced. The relationship of absolute location error from one point to another point was analyzed when tank or combat vehicle run between two points along line path, rectangle path and triangle path respectively. Based on complicated path of combat vehicle, combined with features of some small line, rectangle or triangle paths, the important conclusion was put forward, that is to say, when the start and stop points are fixed, absolute location error of the inertia navigation system has no relations with the path form. This result provides a theoretical basis for setting up scientific and precise test scheme of location precision of inertia navigation system.