制导系统精度分析及误差分配方法

Accuracy Analysis and Error Distribution of Guidance System

研究了一种新的方法流程,针对非线性导弹模型,选用蒙特卡罗方法,对影响精度的各类误差源分类,并进行脱靶量仿真。提出基准弹道概念,按照瑞利准则分析指标要求的精度;根据误差源的控制难度和它们对脱靶量的影响,以及自身的变化灵敏度,合理分配误差指标;仿真结果表明:该方法可以确定影响制导性能的主要误差来源,合理分配各环节的设计指标;它为设计过程中改进制导性能和落实合理的工程指标提供理论依据,是研制过程中一个科学的方法流程。

This paper studied a new flow. On the basis of the nonlinear system of missile, we chose the Monte Carlo analysis to classify the noises which affected the accuracy, and simulate the miss distance. We defined the Fiducial Trajectory, and analyzed the standard miss distance on Rayleigh rule. Finally, we distributed the index by the difficulty of controlling the noises, their effects on miss distance, and the deli cacies when they move. The results of simulation display that this method is a scientific flow which could be used to confirm the main error sources as well as to distribute the design index reasonably. Further more, this method could provide academic basis to improve the guidance performance and carry out reason able project index.