星型CAN网络架构的研究与设计  

Research and design of a star topology for CAN networks

作　　者：张维勇[1] 时伟[1] 王春艳[1] 

机构地区：[1]合肥工业大学安全关键工业测控技术教育部工程研究中心,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2008年第6期871-874,共4页Journal of Hefei University of Technology：Natural Science

摘　　要：局域控制总线CAN网络现已在分布式嵌入式系统中得到广泛使用。但是,由于CAN的总线型拓扑,即使网络中的普通故障,也会导致整个网络的瘫痪,使得其在高可靠性的应用领域中受到限制。文章研究了一种主动型星型网,解决了现有总线型CAN网络的缺陷,通过设计一种主动型的Hub,有效防止了故障在网络中的扩散,并且实现了与现有的CAN网络充分兼容。The controller area network （CAN） is a field bus that is nowadays widespread in distributed embedded systems, however, its use in safety-critical applications has been controversial due to dependability limitations, such as those arising from its bus topology. In this paper, a design for an active star topology is proposed. The design solves the limitations indicated above by means of an active hub, which prevents error propagation from any of its ports to the others. Due to the specific characteristics of this hub, it is fully compatible with existing CAN controllers.

关 键 词：拓扑结构 集线器 CAN协议 容错性 通信系统故障诊断 通信系统故障容忍 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]