FlexRay总线系统的实时调度和网络管理研究

发布时间：2018-12-18 00:06

【摘要】：随着汽车技术的发展，汽车上的电子控制单元不断增多，汽车电子化成为了汽车技术的发展趋势。FlexRay总线作为新一代汽车内部网络通信协议，具有高带宽、确定性和可靠性等特点，能够满足未来先进汽车高速控制的通信需要。本课题以国家电子信息产业发展基金为依托，查阅和收集了大量的国内外文献和研究资料，对FlexRay总线的实时调度和网络管理需求进行了深入研究，从而达到提高总线系统性能的目的。论文首先介绍了汽车FlexRay总线系统的课题背景，，分析了国内外的研究现状。然后针对FlexRay总线静态段调度无法应对系统动态变化的问题，提出一种基于动态分配的静态段调度方法。引入调度节点，以传输触发消息（TM）实现通信周期的循环调度，给出了静态消息的周期调度表（PST）的构建方法，并对其内容进行动态更新。为保证FlexRay总线系统可靠性和安全性，提出在FlexRay总线动态段中实现OSEK网络管理的方法，设计了网络管理协议数据单元到FlexRay数据帧的映射结构以及网络管理状态，给出了网络管理的具体过程，并分析了网络管理消息的发送时延。最后，利用CANoe和DaVinciNetworkDesigner搭建仿真实验平台，根据系统需求，设计了FlexRay总线系统的仿真模型和通信方案，验证了本文提出的调度方法和网络管理方法的有效性和可行性。
[Abstract]:With the development of automobile technology, the number of electronic control units on the automobile is increasing, and the automobile electronization has become the developing trend of automobile technology. As a new generation of internal network communication protocol of automobile, FlexRay bus has a high bandwidth. The characteristics of certainty and reliability can meet the communication needs of the future advanced automobile high-speed control. Based on the National Electronic Information Industry Development Fund, this paper has consulted and collected a large number of domestic and foreign literature and research materials, and made a deep research on the real-time scheduling and network management requirements of FlexRay bus. In order to achieve the purpose of improving the performance of the bus system. Firstly, this paper introduces the background of automobile FlexRay bus system, and analyzes the research status at home and abroad. Then a static segment scheduling method based on dynamic assignment is proposed to solve the problem that the static segment scheduling based on FlexRay bus can not cope with the dynamic changes of the system. The scheduling node is introduced to realize cyclic scheduling of communication cycle by transmitting trigger message (TM). The method of constructing periodic scheduling table (PST) of static messages is presented, and its contents are dynamically updated. In order to ensure the reliability and security of FlexRay bus system, a method of realizing OSEK network management in FlexRay bus dynamic segment is proposed. The mapping structure of network management protocol data unit to FlexRay data frame and the network management state are designed. The concrete process of network management is given, and the transmission delay of network management message is analyzed. Finally, the simulation experiment platform is built with CANoe and DaVinciNetworkDesigner. According to the requirement of the system, the simulation model and communication scheme of FlexRay bus system are designed, and the validity and feasibility of the scheduling method and network management method proposed in this paper are verified.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：U463.6;TP336

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