FlexRay网络静态段时间参数优化  

Optimization of Time Parameters in Static Segment in FlexRay Network

作　　者：王刚[1,2] 荣健[1] 丁天宝[2] 

机构地区：[1]电子科技大学物理电子学院,四川成都610054 [2]西北机电工程研究所博士后工作站,陕西咸阳712099

出　　处：《西南交通大学学报》2012年第2期318-324,共7页Journal of Southwest Jiaotong University

摘　　要：为实现FlexRay总线带宽利用率最大化,对FlexRay静态帧净荷段的长度进行了优化.在已有的FlexRay总线静态段时间优化模型的基础上,通过将其中的非线性算符简化为线性算符,导出了最优静态帧净荷段长度的解析表达式.数值实验验证了解析表达式的正确性,并得到了解析表达式的适用范围.结果表明:FlexRay网络静态帧净荷段的最优长度与所有静态信号平均字节长度的平方根成正比;与数值方法相比,解析表达式的计算效率提高99%以上.In order to achieve the maximum network bandwidth utilization of FlexRay bus,the payload length in a FlexRay static frame was optimized.Based on a present optimization model for the static segment in a FlexRay network and by simplifying a nonlinear operator to a linear one,an analytical expression of the optimal static slot length was derived.The correctness of the expression was validated through numerical experiments and its applicable range was obtained.The research result shows that the optimal value of the payload length of a FlexRay static frame is proportional to the square root of the average length of all the static signals in a FlexRay network,and compared with a numerical method,the analytical expression increases calculation efficiency by 99%.

关 键 词：现场总线 FlexRay网络 静态段 优化 

分 类 号：O412.1[理学—理论物理]