混合动力汽车CAN网络优先级动态分配方法  

Method of Priority Dynamic Distribution of CAN Network in HEV

作　　者：张利[1] 王跃飞[1,2] 严刚[3] 韩江洪[2] 张建军[2] 

机构地区：[1]合肥工业大学机械与汽车工程学院,合肥230009 [2]安全关键工业测控技术教育部工程研究中心,合肥230009 [3]江淮汽车股份有限公司,合肥230009

出　　处：《农业机械学报》2011年第5期20-23,78,共5页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(60873003);高等学校博士学科点专项科研基金资助项目(20070359028);广东省教育部产学研结合项目(N2008B090500226)

摘　　要：在混合动力汽车网络结构和消息实时性分析的基础上,将最早截止期优先算法(EDF)引入到网络集成协议设计中,提出基于EDF调度的优先级分配策略,给出了实现该策略的非均匀分区编码方法及可调度判定条件,指出了该判定条件下的分区因子无关性。仿真结果表明该方法能够满足截止期变化范围较大的CAN消息集传输要求,使网络具有较高的利用率。Designing message priority is one of the key problems in terms of CAN network integrating in hybrid electric vehicle（HEV）.Based on the analysis of structure of automotive network and real-time of message,the EDF algorithm was introduced into the design of system integrating,and the policy of priority designing based on EDF was built.Furthermore,the non-uniform code method and its schedulability condition were described,and the conclusion that before it was presented the partition factor had nothing to do with the schedulability was put forward.The result of the simulation indicated that the method could not only schedule the message set in which the deadline changed a large-scale range,but also had the low network utilization.

关 键 词：混合动力汽车 CAN总线 动态优先级 最早截止期优先算法 截止期编码 

分 类 号：U463.61[机械工程—车辆工程] TP273.5[交通运输工程—载运工具运用工程]