时钟同步精度对TTE实时性影响研究  

Research on Influence of Clock Synchronization Accuracy to TTE Real-Time Performance

作　　者：杨俊雄[1] 徐亚军[1] 何锋[1] 刘志丹[1] 

机构地区：[1]北京航空航天大学电子信息工程学院,北京100191

出　　处：《电光与控制》2016年第8期33-38,共6页Electronics Optics & Control

基　　金：国家自然科学基金(61301086);航空基金(20131951027)

摘　　要：作为时间触发以太网确定性传输的基础,精确的时钟同步受到同步机制、时钟漂移以及接受窗口的影响。建立包含时钟同步服务的节点模型,对混合关键性流量在时间触发以太网中的处理过程进行建模。从理论和仿真两个层面对时间触发以太网的时间确定性进行对比验证。研究了时钟同步精度对时间触发通信的影响,发现时间触发消息丢包事件产生的同步周期边界和接收窗口边界,为时间触发以太网的同步参数设置提供依据。As the basis of deterministic delivery of Time-Triggered Ethernet （TrE）, the accurate clock synchronization is influenced by synchronization mechanism, clock drift and receive window. A model of node and switch supporting synchronization service was designed to transmit multi-class messages. The time determinability of TTE was studied by theoretical analysis and computer simulation, which verified that TIE could be a deterministic network. Through the study of the effect of clock synchronization accuracy on time triggered communication, the synchronization cycle boundary and receive window boundary of TT message loss event were find, which forms a basis for TTE synchronization parameter settings.

关 键 词：航空电子 时间触发以太网 建模仿真 同步周期 接收窗口 性能验证 

分 类 号：V243[航空宇航科学与技术—飞行器设计] TP393[自动化与计算机技术—计算机应用技术]