一种基于CW方程的交会远程导引终端误差分析新方法

直接采用轨道坐标系的相对位置和速度描述交会远程导引误差会产生误差放大的不合理现象，对远程导引误差的精确分析需寻求新的误差描述与分析方法。本文在算例分析的基础上提出了一种基于CW方程的远距离导引终端误差分析新方法，并利用该方法建立误差模型分析远程导引的误差分布与传播。分析结果表明基于CW方程的远程导引误差模型能较为准确地描述远程导引终端的误差状态和后续传播情况，适合在实际工程中用于描述远程导引终端精度指标。

A New Method for Rendezvous Remote Guidance Terminal Error Analysis Based on CW Equation

In traditional error analysis for rendezvous remote guidance, both relative position and velocity between chaser spacecraft and target spacecraft are used to describe the error state. The Monte Carlo simulation in this paper shows that this method will amplify the error state, because both relative position and velocity are correlative. So the traditional method for rendezvous remote guidance terminal error analysis is not quite reasonable. A new method for rendezvous remote guidance error analysis based on CW equation is proposed in this paper, and the error model constructed by this method is used to analyze the distribution and propagation of rendezvous remote guidance error. The result shows that the error model based on CW equation can more accurately describe the state and its propagation of rendezvous remote guidance terminal error than traditional method, so the new method is good to describe the accuracy index of rendezvous remote guidance in practical engineering.