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我国正在进行月球采样返回工程,月球轨道交会对接是采样返回任务中关键环节之一.本文提出了一种新交会过程中目标航天器和追踪航天器自主航方法.该方法综合利用成像敏感器、交会雷达和激光高度计测量信息,结合绝对轨道动力学模型,利用UKF滤波算法设计航滤波器,能够同时估算交会对接过程中追踪航天器和目标航天器绝对轨道参数.在月球阳照区,采用成像敏感器和交会雷达测量信息进行自主航;在月球阴区,则采用交会雷达和激光高度计测量信息进行自主航.通过理论分析和数学仿真,验证了所提出自主航方法有效性.本文所提出方法为月球轨道交会对接工程实现提供了理论参考.
The lunar orbit rendezvous and docking is one of the key aspects in the sampling and returning mission.This paper presents a method of target spacecraft and autonomous spacecraft for tracking spacecraft in the process of new rendezvous.The method utilizes the imaging sensor, Rendezvous radar and laser altimeter measurement information, combined with the absolute orbital dynamics model, the UKF filter algorithm designed filter can simultaneously estimate the intersection of docking rendezvous and tracking spacecraft and target spacecraft absolute orbital parameters in the lunar Yangzhao area, the use of imaging Sensors and rendezvous radar measurement information autonomous navigation in the lunar area, then the use of rendezvous radar and laser altimeter measurement information for autonomous navigation.Through theoretical analysis and mathematical simulation, the validity of proposed autonomous navigation method proposed in this paper It provides a theoretical reference for the realization of lunar orbit rendezvous and docking project.