星载CAN总线即插即用解决方案

Plug and play solution on onboard CAN bus

在航天工程中,面对任务的不同需求,使用的CAN总线通信协议往往是有针对性的,这使得任务之间难以通用,造成了协调工作的困难。为解决这一问题,提出以EDS为核心内容的CAN总线即插即用解决方案,包括EDS格式、握手协议、主从节点、汇聚层和EDS工具链的设计等内容。EDS的设计分为握手EDS和通信EDS,允许对入网节点的消息格式和内容进行个性化描述。主节点的设计内容主要是消息编排算法,根据EDS完成总线通信的构建,实现对新加入节点的自动识别和正常通信。汇聚层的设计旨在进行异构子网之间的协议同构。EDS工具链的设计能方便CAN总线即插即用解决方案在实际项目中的推广和应用。

In aerospace engineering,facing different mission requirements,the formulation of CAN bus application protocol is often targeted,which makes the protocols less general between missions and causes difficulties in project coordination.To solve this problem,a plug-and-play solution on CAN bus was proposed with electronic data sheet(EDS)as the core content,including the design of EDS format,handshake protocol,master and slave node,convergence layer protocol and EDS tool chain.The shake-hand EDS and communication EDS were designed to allow personalized description of the message format and content of the nodes joining the bus system.The design of master node was mainly the message arrangement algorithm,which realized the automatic identification of EDSs and normal communication with newly added nodes.The design of convergence layer protocol aimed at centralized protocols between heterogeneous subnets.EDS tool chain facilitated the promotion and application of the CAN bus plug-and-play solution in projects.