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SFODB(Spaceborne Fiber Optic Data Bus)的提出主要是为解决飞行器内部有效载荷数据率日益提高这一迫切问题,它是一种基于商用异步传输模式(ATM)的高速航天数据总线技术,适合于空间探测器的海量数据包传输.其物理拓扑是由光纤链路连接多个FBIU单元以及单个CFBIU单元组成的环形网络,各节点之间的距离不超过100m,基本数据率可从200Mbit·s~(-1)变化至1Gbit·s~(-1),并具有极高的实时性和可靠性,相比其他总线网络规模小,性能更优.针对SFODB的特性,分析了其发展现状和技术途径,提出了一种在飞行器内部采用SFODB总线作为主干网的数据网络架构,该网络能完成飞行器内部不同数据率载荷的分类分层可靠传输.在此基础上对SFODB的研究与应用提出了建议.
The proposed Spaceborne Fiber Optic Data Bus (SFODB) is mainly to solve the urgent problem of increasing the data rate of the internal payload of the aircraft. It is a high-speed aerospace data bus technology based on the Commercial Asynchronous Transfer Mode (ATM) and is suitable for space exploration The physical topology is a ring network composed of a plurality of FBIU units and a single CFBIU unit connected by an optical fiber link, the distance between each node is no more than 100m, and the basic data rate is from 200Mbit · s ~ (- 1) to 1Gbit · s ~ (-1), and has extremely high real-time and reliability compared with other bus networks with small size and better performance.According to the characteristics of SFODB, its development status and technical approaches are analyzed, A data network architecture using SFODB bus as the backbone in the interior of the aircraft is proposed.The network can accomplish the classified and reliable transmission of different data rate loads within the aircraft.On the basis of this, some suggestions are put forward for the research and application of SFODB.