基于航电总线的分布式实时监控系统同步算法  

Clock Synchronization for Distributed Multi-bus Control System

作　　者：季健[1] 赵振宇 王洲 庄毅[1] 顾晶晶[1] 

机构地区：[1]南京航空航天大学计算机科学与技术学院,南京210016 [2]中航科技集团613研究所,河南洛阳471000

出　　处：《小型微型计算机系统》2013年第4期936-940,共5页Journal of Chinese Computer Systems

基　　金：航空科学基金项目(2010ZC13012)资助

摘　　要：随着航空技术、计算机软硬件技术的高速发展,航电综合系统的高精度时钟同步越来越重要.针对多总线分布式实时监控系统要求各设备高度时间同步的问题,本文在分析国内外已有时钟同步算法的基础之上综合考虑了传输时延、时钟偏移误差及网络排队时延,并将实时监控流量带来的网络抖动现象作为重要因素引入到同步算法中,设计了基于TSC的高精度软时钟服务机制,提出一种基于航电总线的分布式实时监控系统时钟同步算法CSA-RTMS,并详细分析了误差范围等性能.实验结果表明,与传统的NTP同步协议相比,该同步方法精度更高,同步效率快,而且受网络抖动影响小.As the rapid development of aviation technology, computer hardware and software technology, the high-precision clock synchronization of Avionics integrated system is increasingly important. For the high precision of the equipment required time synchronization for Distributed real-time monitoring system, we took into account the transmission delay, clock offset error and network queuing delay, and bring network traffic jitter as an important factor into the synchronization algorithm, after the analysis of domestic and foreign synchronization algorithm. And we designed a high-precision soft clock service which based on TSC; proposed a distributed clock synchronization algorithm CSA-RTMS which based on avionics bus-based real-time monitoring system; and analyzed the error range of the performance. Compared to the traditional NTP synchronization protocol, experimental results show that, our synchronization method which less affected by the network jitter, has higher accuracy and faster efficiency.

关 键 词：多总线监控 时钟同步 高精度时钟 排队时延 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]