中国空间科学技术

中国空间科学技术 ›› 2020, Vol. 40 ›› Issue (1): 94-.doi: 10.16708/j.cnki.1000-758X.2020.0012

• 技术交流 • 上一篇    

高轨卫星星载计算机优化设计与实现

徐楠，李朝阳，王兆琦，韩笑冬，安卫钰，王晓宇，冯彦君   

  1. 1中国空间技术研究院，北京100094
    2航天恒星科技有限公司，北京10086
    3山东航天电子技术研究所，烟台264003
  • 出版日期:2020-02-25 发布日期:2020-02-18

Optimization design and realization of GEO satellite onboard computer

XU Nan，LI Zhaoyang，WANG Zhaoqi，HAN Xiaodong，AN Weiyu，WANG Xiaoyu，FENG Yanjun   

  1. 1China Academy of Space Technology，Beijing100094，China
    2Space Star Technology Co., Ltd., Beijing100086, China
    3Shandong Institute of Space Electric Technology，Yantai264003，China
  • Published:2020-02-25 Online:2020-02-18

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摘要： 首先对当前星载计算机系统在高轨卫星领域的应用现状进行了分析，主要涉及处理器最小系统的存储器设计、数据共享及总线协议设计等。针对上述3个方面存在的不足，提出了处理器最小系统存储器优化设计方案，解决了存储器应用与选型的困境；采用“存储器+FPGA电路”的设计方法，实现了主备机数据共享；提出了一种自适应总线协议设计方法，解决了1553B总线协议通用性较差等问题。提出的设计方法，在中国下一代大容量通信卫星平台的星务计算机系统中得以应用，并取得了较好的效果，为星载计算机系统后续优化设计工作提供了新的思路。

关键词: 高轨卫星, 星载计算机, 存储器, 数据共享, 总线协议

Abstract:  The current design of GEO orbit satellite onboard computer was analyzed, including memory design, data sharing design and bus protocol design. In view of the shortcomings of the above three aspects, a CPU minimum system memory optimization design method was proposed, which solves the memory chip selection problem. A “memory + FPGA circuit” design method was proposed realizing data sharing between nominal and redundancy onboard computer.An adaptive bus protocol design method was proposed which makes the 1553B bus protocol more general. The design method proposed has been applied in the next generation high capability communication satellite onboard computer in China, and promising results have been obtained. It also provides a new way of thinking for the followup optimization design of the onboard computer.

Key words: GEO satellite, onboard computer, memory, data sharing, bus protocol