EtherCAT网络中非周期信息的实时调度  

Scheduling of Aperiodic Real-time Messages over EtherCAT Networks

作　　者：杨勇军[1] 龙辛 王纪新[1] 

机构地区：[1]湘潭大学智能计算与信息处理教育部重点实验室,湖南湘潭411105 [2]湘电集团湘电风能有限公司,湖南湘潭411105

出　　处：《机械工程与自动化》2017年第3期69-70,共2页Mechanical Engineering & Automation

摘　　要：由于Ether CAT的设计主要应用于周期通信,对非周期性信息的实时传输效率并不高,需要较长循环时间,给出了Ether CAT网络中非周期性实时信息基于优先级驱动交换调度的一个通用框架,此框架提出的交换机制具有循环周期短的特点。描述了优先级驱动交换的原理,对动态优先级和静态优先级的调度进行了分析,并且通过OMNe T++对几种方法做出了仿真评估。As EtherCAT was specifically devised for periodic traffic,aperiodic real time transmissions are far from being efficient,as they entail long cycle times. To overcome this limitation,this paper presents a general framework for priority driven swapping-based scheduling of aperiodic real-time messages over EtherCAT networks, which uniformly covers both dynamic and static priority and allows for very short cycle times. The paper provides a description of the priority-driven swapping framework,a schedulability analysis for both static priority and dynamic priority scheduling,and uses the tool of OMNeT＋＋ to make some simulation evaluation.

关 键 词：EtherCAT协议 非周期信息 工业实时以太网 调度 

分 类 号：TP393.11[自动化与计算机技术—计算机应用技术]