Design And Implementation Of Satellite Plug And Play System Based On CAN Bus

Satellite plug-and-play technology is a key technology for the development of rapid response satellites.Traditional satellites have long development cycle and complex assembly configuration,which are no longer accord with the rapid development of micro satellites.Therefore,the development of satellite plug-and-play technology and the design of satellite plug-and-play systems which supports multiple satellite platform devices and payloads have become a trend in microsatellites research.The working principle of satellite plug-and-play system and satellite plug-and-play system technology are analyzed,and the overall design of satellite plug-and-play system are introduced.This system design mainly includes three main contents: Firstly,the scheme of CAN bus as the satellite plug-and-play system bus is developed,and the satellite plug-and-play system communication protocol based on CAN2.0B standard is designed.Secondly,the satellite plug-and-play system interface conversion module based on STM32F105R8T6 chip is designed by demand analysis.The software design of the interface conversion module is completed,and the conversion from traditional satellite equipment to standardized satellite plug-and-play equipment is realized.Finally,the satellite plug-and-play system software is written,which includes device discovery function module,device registration function module,device service configuration function module and state detection function module.A self-describing file for satellite plug-and-play device based on XML language(xTEDS)and its self-describing file resolution mechanism are designed.Finally,the verification software based on MyEclipse is designed,and a functional verification platform is set up.The functions of device discovery,device registration,device service configuration and status detection of the satellite plug-and-play system based on CAN bus are realized.The results show that the CAN bus-based satellite plug-and-play system designed in this paper can dynamically discover the device access and adaptively configure it during operation,subscribe to the service,etc.Finally the plug-and-play function of the satellite device is realized.