电光与控制, 2017, 24 (6): 74, 网络出版: 2017-07-10
时间触发总线时钟同步技术研究
Synchronization Algorithm of Time Triggered Protocol Bus
摘要
时间触发协议(TTP)总线, 或称时间触发总线, 是一种用于安全关键实时控制系统的总线, 采用基于全局时间基的时间触发通信机制。针对时钟同步高精度、容错的要求, 研究了时间触发总线时钟同步算法, 在OMNeT++仿真环境下建立了节点机模型和时钟同步算法模型, 构建了时间触发总线系统模型, 对时钟同步算法进行仿真, 验证了同步算法。在同步周期足够的情况下, 可以达到1 μs以内的同步精度。
Abstract
Time-Triggered Protocol (TTP),or time-triggered bus,is a bus used in safety-critical,real-time control system adopting the time-triggered communication mechanism based on global time.Considering the requirements of clock synchronization on high precision and fault tolerance,we studied the algorithm of clock synchronization of TTP,established a TTP node model and the algorithm of clock synchronization by using OMNeT++.Simulation was made to the algorithm of clock synchronization and verified the correctness of it.With enough synchronization period,the precision can be less than 1 μs.
陈长胜, 刘智武, 李晓庆, 季雷, 杨洁. 时间触发总线时钟同步技术研究[J]. 电光与控制, 2017, 24(6): 74. CHEN Chang-sheng, LIU Zhi-wu, LI Xiao-qing, JI Lei, YANG Jie. Synchronization Algorithm of Time Triggered Protocol Bus[J]. Electronics Optics & Control, 2017, 24(6): 74.