基于最小系统的小卫星在轨软件重构系统设计

Design of on-orbit software reconfiguration system of small satellite based on minimum system

提出一种基于星载终端处理设备最小系统的小卫星在轨软件重构系统设计方案。依据星上信息流实现现状,设计重构系统的系统框架,提出星载终端处理设备的最小系统组成、通用功能集和需要满足的整星安全性功能需求。系统中,应用软件程序数据按照注入帧格式通过遥控通道注入到星上,可缓存在星务存储器中再分发给终端目的设备,通过最小系统软件对应用程序进行引导和加载管理,整个过程均有差错控制设计以保证其可靠性和安全性。软件重构试验和容错试验表明,利用该系统可实现星载微计算机软件和FPGA配置数据的可靠上注、可靠存储和可靠加载。

Based on the minimum system of onboard terminal processing equipment,a scheme of on-orbit software reconfiguration system is designed.According to the characteristics of current satellite information flow,the system framework is designed,and the minimum system composition,general function set and the whole satellite security functional requirements of the onboard terminal equipment processor are proposed.In the system,the application software program data is made into data transfer frame and transmitted into the satellite through the telecommand channel,which can be stored in the memory of OBDH subsystem and send to the terminal equipment.Application program can be bootload and managed by the minimum system with error control design to ensure its reliability and safety.The test shows that the system can realize the reliable transfer,storage and bootload of onboard microcomputer software and FPGA configuration data.