基于数据压缩的车身CAN网络优化调度设计  

Optimized Scheduling of Vehicle Body CAN Based on Data Compression

作　　者：张国胜[1] 王书举[2] 

机构地区：[1]交通运输部公路科学研究院运输车辆运行安全技术交通行业重点实验室,北京100088 [2]辽宁工程技术大学机械工程与自动化学院,阜新123000

出　　处：《汽车工程》2015年第8期980-984,共5页Automotive Engineering

基　　金：国家自然科学基金青年基金(51305181和51405213)资助

摘　　要：针对汽车车身网络节点日渐增多而低速CAN带宽资源有限的问题,引入减少网络传输数据的数据压缩技术,分析了车身网络信息数据变化特点,提出了基于数据压缩的变化优先(CF)的优化调度算法,介绍了CF算法的数据压缩、解压缩和调度原理,将CF算法应用于汽车车身控制系统设计,理论分析和实验验证的结果表明,该算法可显著降低车身CAN总线负载,改善信息的实时性,提高车身CAN总线的扩展灵活性。In view of the contradiction between the ever increasing network nodes in vehicle body and the limited bandwidth resources of low-speed CAN,a data compression technique is introduced to reduce network transmission data.Then based on the analysis on the changing features of vehicle body network data,an optimization scheduling algorithm with ＂ changed first＂ principle is proposed for data compression and is then applied to the control system design of vehicle body.The results of theoretical analysis and experimental verification indicate that the algorithm proposed can obviously reduce the load of vehicle body CAN bus,improve the real time performance of information and enhance the expansion flexibility of vehicle body CAN bus.

关 键 词：车身 控制器局域网 优化调度 数据压缩 

分 类 号：U463.6[机械工程—车辆工程]