仅测角导航的自主交会闭环控制偏差分析

基于仅测角的相对导航技术是降低航天器相对导航系统复杂性和成本的有效手段。在仅测角相对导航模式下，对自主交会闭环控制过程的状态偏差进行了分析和仿真。基于相对动力学方程，建立了以仅测角为测量参数的非合作式相对导航模型。采用脉冲闭环控制方式，对追踪器在仅测角导航条件下的相对导航协方差及相对运动轨迹控制协方差进行了分析。最后，采用数值仿真手段，对自主交会闭环控制过程的导航和轨迹控制协方差特性进行了分析，并通过100次Monte Carlo打靶仿真验证了轨迹控制协方差分析的正确性。

Analysis of Closed-Loop Control Covariance for Autonomous Orbital Rendezvous using Angles-only Relative Navigation

Angles-only relative navigation is an effective way to reduce the complexity and cost of relative navigation system for spacecrafts. In this paper, the close-looped covariance of autonomous orbital rendezvous based on angles-only relative navigation is analyzed. According to relative dynamics equations, the uncooperative relative navigation model with angles-only measurements are set forth, while the close-looped linear covariance model for relative navigation and trajectory control are obtained based on impulsive control assumption. At last, the states covariance of angles-only relative navigation and close-looped trajectory control are calculated according to the linear covariance model, and the validity of the covariance results are shown through 100 times Monte Carlo simulations.