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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。
Relative navigation based on angle-only measurement is an effective way to reduce the complexity and cost of spacecraft relative navigation system. Under the condition of only angular relative navigation, the state deviation of the closed-loop control of autonomous rendezvous is analyzed and simulated. Based on the relative dynamics equations, a non-cooperative relative navigation model with only goniometry as measurement parameters was established. The closed-loop control method is used to analyze the relative navigation covariance and the relative motion trajectory control covariance of the tracker under the condition of only angular measurement. Finally, numerical simulation is used to analyze the navigation and trajectory control covariance characteristics of the closed-loop control of autonomous rendezvous and the correctness of the trajectory control covariance analysis is verified by 100 Monte Carlo targeting simulations.