SpaceWire总线同步与容错技术研究

发布时间：2018-07-31 05:35

【摘要】：随着空间任务的日益复杂,航天器所承担的功能也越来越多,呈现出多样性和复杂性等特点,对数据处理的能力和可靠性也提出了更高的要求。SpaceWire是欧空局(ESA)在2003年提出的数据网络标准,具有串行、高速(2Mbps~200Mbps)、点对点和全双工的特点,相较于其它总线,其拓扑结构灵活,具有很好的抗辐射特性,特别是在错误检测、异常处理及故障隔离等方面具有突出的优势。自SpaceWire发布以来,已经在多个空间任务中得到了广泛的运用。本文首先介绍了课题的研究背景,对各空间总线协议进行性能比较,给出了SpaceWire的优势和在空间项目中的应用。其次,结合协议标准,对SpaceWire的六层结构进行了详细介绍。第三,对协议中用于总线同步的时间码进行了深入研究。第四,完成SpaceWire接口单元的模块划分和设计,并对时间码在网络中的传输进行了功能仿真。第五,为提高系统的可靠性,设计具有冗余链路切换功能的网络,通过功能仿真,验证了方案的可行性。最后,针对本文中存在的一些问题,提出了优化改进的方向,对SpaceWire的进一步研究和应用,具有参考意义。
[Abstract]:With the increasing complexity of space missions, spacecraft are assuming more and more functions, showing the characteristics of diversity and complexity. SpaceWire is a data network standard proposed by ESA (ESA) in 2003. It has the characteristics of serial, high speed (2Mbps~200Mbps), point-to-point and full duplex. Compared with other buses, its topology structure is flexible. It has good radiation resistance, especially in error detection, exception handling and fault isolation. Since the release of SpaceWire, it has been widely used in many space missions. This paper first introduces the research background of the subject, compares the performance of each space bus protocol, and gives the advantages of SpaceWire and its application in space projects. Secondly, the six-tier structure of SpaceWire is introduced in detail with the protocol standard. Thirdly, the time code used in bus synchronization is studied in detail. Fourthly, the module partition and design of SpaceWire interface unit are completed, and the time code transmission in the network is simulated. Fifthly, in order to improve the reliability of the system, the network with redundant link switching function is designed. The feasibility of the scheme is verified by functional simulation. Finally, aiming at some problems in this paper, the paper puts forward the direction of optimization and improvement, which has reference significance for further research and application of SpaceWire.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TP336

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