一、引 言 为了预测无平台惯性导航系统的工作精度,需要有为试验所证实的描述系统主要误差性质的分析关系式。运用这样的误差模型,可以给出总和误差每个分量的统计估值。总计飞行器轨迹所有各阶段的误差估值,可以得出系统在飞行中的合成误差。 汤姆森腊莫伍德里奇公司设计了一种无陀螺稳定平台的应急导航系统,这种系统曾应用于宇宙飞船“阿波罗”登月舱的最近几次载人飞行中。在研究这个系统时,对其精度也进行了估计。 I. INTRODUCTION In order to predict the accuracy of a platformless inertial navigation system, there is a need to have an analytical relationship that describes the major error nature of the system as demonstrated by the tests. Using such an error model, a statistical estimate of each component of the sum error can be given. Estimating the error of all phases of the aircraft trajectory can lead to the resultant error of the system in flight. Thomsen-LaMoood Ridge designed an emergency navigation system without a gyro stabilized platform that was used in the last few manned flights of the space shuttle Apollo. In studying this system, its accuracy is also estimated.