【作者】 尚利宏； 林琦； 金惠华；

【Author】 Shang Lihong Lin Qi Jin Huihua (School of Computer Science and Engineering,BUAA,Beijing 100083,China)

【机构】 北京航空航天大学计算机学院；

【摘要】 作为 CAN 总线(Controller Area Network)的应用层扩展协议,CANaerospace 协议在继承 CAN 总线已有物理层和数据链路层的基础上,引入时间触发调度机制,并提供全局时钟同步服务,以满足航空领域对实时性和可靠性的要求。本文在对 CANaerospace 协议深人研究的基础上,建立了相关的计算模型,定量地分析讨论了 CANaerospace 协议的带宽利用率、时钟同步精度、传输响应时间等与实时性密切相关的几个特性。同时给出了与 MIL-STD-1553B 总线性能的比较。更多还原

【Abstract】 As the application layer expansion of CAN(Controller Area Network),CANaerospaee is a pro- tocol/data format definition which was designed for the highly reliable real-time communication in airborne applications based on CAN physical layer and data-link layer.It uses the time-triggered bus scheduling strategy,and supplies global clock synchronization service.Based on the in-depth research,a calculation model is built,and several key identities as bandwidth utilization rate,precision of the clock synchronization and response time are analyzed.Meanwhile,the performance comparing result between MIL-STD-1553B and CANaerospace is shown.更多还原