电光与控制, 2016, 23 (8): 33, 网络出版: 2021-01-26
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
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 avionics Time-Triggered Ethernet ( TTE) modeling and simulation synchronization cycle receive window performance verification
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。
Abstract
As the basis of deterministic delivery of Time-Triggered Ethernet(TTE), 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 TTE 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.
杨俊雄, 徐亚军, 何锋, 刘志丹. 时钟同步精度对TTE实时性影响研究[J]. 电光与控制, 2016, 23(8): 33. YANG Jun-xiong, XU Ya-jun, HE Feng, LIU Zhi-dan. Research on Influence of Clock Synchronization Accuracy to TTE Real-Time Performance[J]. Electronics Optics & Control, 2016, 23(8): 33.
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