关于SpaceWire总线接口可靠性的研究

Study on Reliability of SpaceWire Interface

摘要:

为满足航天器有效载荷间高速数据传输的发展需求,提出了两种SpaceWire总线可靠性的改进方案;在SpaceWire总线描述的基础上,分析了字符的正确性校验和传输过程中的错误及检测恢复机制等提高可靠性的方法;针对通信链路发生物理性故障的问题,提出了两种基于硬件冗余机制的SpaceWire可靠性改进方案,一种是在系统间建立两个相独立的协议装置,另一种是使用多路输出选择器进行切换将数据传输给目的节点;通过实验验证,两种方案能够处理通信链路出现物理故障的问题。

Abstract:

To meet the high speed data transmission between the spacecraft payloads for the future development of demand, proposes two programs to improve the reliability of SpaceWire. Based on describing SpaceWire, analyzed the validity check of the characters, error detection and recovery mechanism in the process of transmission to improve the reliability of SpaceWire. For the problem of physical failures occurring in the communication links, presented two programs to improve the reliability of SpaceWire based on hardware redundancy mechanism. One is establishment of two separate protocol devices between systems, another is to use demultiplexer for switching transmit data to the destination node. 