星载FlexRay总线应用层传输方法研究  

Study of FlexRay Bus Application Layer Process for Satellite

作　　者：袁春柱[1] 刘思远[1] 杨芳[1] 

机构地区：[1]航天东方红卫星有限公司,北京100094

出　　处：《航天器工程》2013年第3期67-71,共5页Spacecraft Engineering

基　　金：国家重大科技专项工程

摘　　要：现代卫星星上综合电子分布式拓扑结构,作为电子系统信息交互媒介的数据总线,其性能直接影响着星上电子系统的信息交流与共享。文章选择了新一代车载FlexRay总线作为星上电子系统数据总线,结合星载应用,阐述了FlexRay总线的数据帧结构,给出了卫星应用FlexRay总线静态段时隙和动态段"微时隙"大小的计算方法,并定义了FlexRay总线动态段、静态段的时隙参数。最后,分析了星上电子系统的工作模式,配置了FlexRay总线星上时隙。此应用层传输方法能够满足卫星应用FlexRay总线的通信实时性和稳定性要求。Modern satellite avionics is distributed topology structure.Its on-board network,as a medium of electronic device for information exchange,directly affects on-board electronic system in information communication and share.This paper chooses next generation automotive bus FlexRay bus as on-board network.The frame data structure and adaptability of FlexRay for satellite avionics application are described.A method used to compute static slot and dynamic mini-slot is presented.Parameters of static slot and dynamic mini-slot are defined.Finally,operation mode of satellite avionics is analyzed and slot of FlexRay bus for satellite is designed.This communication method of application layer can meet real-time and stability of FlexRay bus for satellite.

关 键 词：星载总线 FLEXRAY总线 应用层 

分 类 号：TN927.2[电子电信—通信与信息系统]