摘要
为了提高FlexRay总线动态段的带宽利用率和通信实时性,建立了动态消息调度模型,并提出了动态消息平均响应时间概念,基于对动态消息响应时间的分析,推导出了其定量计算公式,并给出了动态消息优先级和时隙ID分配原则;在此基础上,建立了以动态段长度最小为目标,以动态消息实时性为约束的FlexR ay动态段参数配置优化模型,并给出了求解该模型的ARDS算法。最后采用CANoe软件进行仿真实验,验证本文所提方法的正确性和有效性。
In order to improve the bandwidth utilization and real-time of FlexRay dynamic segment, the scheduling model of dynamic message is established and the average response time conception of dynamic message is putted forward. The calculation formula of the average response time of dynamic message is deduced based on the analysis of dynamic message response time and the allocation principle of dynamic slot ID and priority of dynamic message is given. On this basis, parameter configuration optimization model of FlexRay dynamic segment is established and ARDS algorithm of the model is presented. The target of optimization model is the minimum length of dynamic segment, with the constrain of real-time of dynamic message. Finally CANoe simulation software is used to verify the correctness and effectiveness of the method in this paper.
作者
刘红军
黄斌
孙旭辉
LIU Hong-jun HUANG Bin SUN Xu-hui(School of Automotive and traffic Engineering, Hefei University of Technology, Hefei230009, China School of Mechanical Engineering, Hefei University of Technology, Hefei230009, China)
出处
《汽车科技》
2017年第2期34-39,共6页
Auto Sci-Tech
