交会对接远距离导引终点精度对远距离导引、近距离导引阶段的划分具有重要意义。在分析了影响远距离导引终点精度的误差因素和在建立简化动力学模型基础上,提出了利用拟平均根数法和协方差法进行误差传播计算的方法;推导了远距离导引终点精度分析数学模型;进行了仿真计算,结果表明方法可行,在一定条件下,远距离导引终点的位置误差可以控制在5km以内,速度误差可以控制在3m/s以内。 Rendezvous and docking precision of long-distance guidance end point is important for the division of long-range guidance and short-range guidance stage. Based on the analysis of the error factors that affect the accuracy of the long-range guidance end point and the establishment of a simplified dynamic model, a method of calculating the error propagation using the quasi-mean-root method and the covariance method is proposed. The accuracy of long-range guidance end point derivation The simulation results show that the method is feasible. Under certain conditions, the position error of long-distance guidance end point can be controlled within 5km, and the speed error can be controlled within 3m / s.