基于FlexRay总线的微小卫星姿态控制数据传输系统

发布时间：2018-08-02 09:52

【摘要】：微小卫星内部通信总线是卫星内部各个载荷单元进行数据通信与指令传输的重要通道,总线性能的好坏直接影响到卫星载荷单元任务执行的效率。目前常用的CAN、1553B总线虽然具有较为成熟的应用场景,但因其事件触发的传输特性以及较低的数据传输速率已经不足以满足现代化卫星总线的性能需求,因此,急需寻找一种速率更快、传输特性更稳定的总线。本课题依托于中国航天xx研究院关于新一代卫星Flex Ray总线预研课题,将高端汽车工业中的FlexRay总线技术结合实际卫星载荷需求,移植到航天工业微小卫星中,本文的主要研究工作为:1.对Flex Ray总线进行技术研究和调研,结合实际卫星内部通信总线的需求设定该总线技术在卫星系统中的应用场景。2.对Flex Ray协议中通信控制单元、总线驱动器、协议收发器各个模块进行设计与研制,并对Flex Ray通信模块的外围硬件电路进行详细的设计与研制。通过多种拓扑结构和传输机制对Flex Ray总线数据传输性能进行研究,包括节点对节点通信、集群网络之间的通信和混合型拓扑结构的通信机制设计,并分别对不同拓扑结构的总线传输性能进行长时间的测试以及可靠性试验。3.系统在具有FlexRay总线通信功能之后,设计了多个模拟卫星敏感器单元的Flex Ray从节点,验证了本系统能够正常运行微小卫星姿态控制数据传输算法。
[Abstract]:Intra-satellite communication bus is an important channel for data communication and instruction transmission in each load unit of satellite. The performance of the bus directly affects the efficiency of the task execution of the satellite payload unit. Although the commonly used CANN 1553B bus has a mature application scenario, its event triggered transmission characteristics and low data transmission rate are no longer sufficient to meet the performance requirements of modern satellite bus. There is an urgent need to find a bus with faster speed and more stable transmission characteristics. This project is based on the research of the new generation of satellite Flex Ray bus in the China Aerospace xx Research Institute. The FlexRay bus technology in the high-end automobile industry is transplanted to the micro satellite of the aerospace industry in combination with the actual demand of satellite payload. The main research work of this paper is: 1. The technology of Flex Ray bus is researched and investigated, and the application scenario of the bus technology in satellite system is set up according to the requirement of the actual communication bus. Each module of communication control unit, bus driver and protocol transceiver in Flex Ray protocol is designed and developed, and the peripheral hardware circuit of Flex Ray communication module is designed and developed in detail. The performance of Flex Ray bus data transmission is studied through a variety of topology and transmission mechanisms, including node to node communication, communication between cluster networks and hybrid topology communication mechanism design. The bus transmission performance of different topologies is tested for a long time and reliability test. 3. After having the function of FlexRay bus communication, the Flex Ray slave node of several analog satellite sensor units is designed, which verifies that the system can run the microsatellite attitude control data transmission algorithm normally.
【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】：2014
【分类号】：V448.22;TN919.6

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