基于异步通信链路的AFF星间基线测量技术研究

Intra-satellite Baseline Measurment Via Asynchronous Communication Link of Autonomous Formation Flyer

星间基线的精密测量是自主编队航天器(AFF:Autonomous Formation Flyer)实现多星协同任务的关键技术。基于CCSDS Proximity-1协议,提出一种在AFF星间全双工通信链路中利用双向异步传输帧实现非相干扩频测距和时间同步的方法,给出算法的计算公式和理论误差模型。技术验证系统的实验结果表明提出的方法性能指标先进、信道资源利用率高、功能集成度高。

Intra-satellite baseline measurement is key technology of Autonomous Formation Flyer （AFF）. Intergrated mode of intra-satellite communication ＆ baseline measurement in AFF communication networking is proposed and researched. In this mode, precisely ranging ＆ time synchronization are performed by bidirection asynchronous transfer frame of CCSDS proximity - 1 protocol via intra-satellite full-duplex communication link, concerned formulas and algorithm error model of asynchronous ranging/ time synchronization are proposed and analyzed in details. Experiment results show that the technologies developed in this paper have excellent precision, higher reliability, multiple fuctions integrated, more effective utilization ratio of radio channel.