汽车CAN总线可视化实时性分析研究及仿真  

Research on Visual Real-time Analysis and Simulation for Automotive Controller Area Network (CAN)

作　　者：曹万科[1] 张天侠[1] 张霏霏[1] 张芙君[2] 王永富[1] 

机构地区：[1]东北大学机械工程与自动化学院车辆工程研究所,沈阳110004 [2]东北大学信息科学与工程学院自动化仪表研究所,沈阳110004

出　　处：《系统仿真学报》2008年第9期2345-2347,2374,共4页Journal of System Simulation

基　　金：沈阳市科技基金(1063287-1-00)

摘　　要：针对事件触发的CAN协议对信息最坏传输时间不具有限制能力这一缺陷,在设计分布式系统CAN总线时为保证信息的在线传输实时性,须对信息的传输实时性进行严格地离线分析。可视化技术是研究工程问题的高效方法与手段。为此本文在研究著名的实时性分析方法即比率单调分析法(RMA)基础上推导出新的易于可视化实现的单步递推关系(SSRR)方程,并基于此原理采用MATLAB/GUI设计可视化实时性分析软件工具,最后把其应用到某汽车CAN总线信息进行离线实时性分析,并采用CAN总线实验系统对分析结果进行系统仿真运行验证。结果表明了该方案的性能优越性。One of the perceived drawbacks to event-triggered CAN has been the inability to bound accurately the worst-case response time of a given message. To support online-transmission-timeliness guarantees of real-time messages, an adequate offline schedulability analysis is necessary for any real-time distributed CAN bus-based control system. Visual technology is effective way for engineering. A group of new simple single-step-recurrence relation （SSRR） expressions were deduced from the famous rate monotonic analysis （RMA）, and the visual software based on the SSRR for real-time analysis of CAN with MATLAB/GUI was designed. The software was used to real-time analysis for an automotive CAN control system and an online experiment based on CAN development system was made to test the analysis. The result testifies the feasibility of the scheme.

关 键 词：比率单调分析法 单步递推关系 可视化设计 离线实时性分析 在线实验 

分 类 号：TP336[自动化与计算机技术—计算机系统结构] U463.3[自动化与计算机技术—计算机科学与技术]