实时分布式系统中的时间同步  

Time Synchronization in Real-Time Distributed System

作　　者：魏建军[1] 康继昌[1] 雷艳静[1] 陈付龙[1] 

机构地区：[1]西北工业大学计算机学院,陕西西安710072

出　　处：《中北大学学报（自然科学版）》2007年第5期412-416,共5页Journal of North University of China(Natural Science Edition)

基　　金：国家863计划引导项目(2003AA001018);航空科学基金资助项目(02F53031)

摘　　要：实时分布式系统必须建立统一的时间服务系统,以获得可靠、确定的系统时间.从时间同步技术着手,分析了实时分布式系统中的传输延迟和容错策略,提出了时钟速率因子和'淡入淡出'时间调整方法,确定了同步周期.在具体的软硬件平台上,采用主从式时间同步化策略,实现了'机载实时分布式系统'中的时间同步,保证了系统实时、可靠、稳定地运行.The real-time distributed system must establish the united time server system to realize the reliable and definitive system time. The propagation delay and the fault-tolerant in the real-time distributed system are analyzed. The clock speed rate factor and the arithmetic of ＂fade in, fade out＂ are provid- ed to determine the synchronization period. Using the strategy of master-servant, the time synchronization in the real-time distributed system in the airborne computer is realized with the software and hardware platform in practical. This way ensures that the system has the capacity of the real-time, reliability and stability.

关 键 词：延迟 容错 时间同步 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]