基于工业网络的分布式时钟同步算法研究

摘要

In order to realize the clock synchronization in the process of the industrial control, network communication protocol IEEE 1588 standard based on Ethernet, as the most widely used clock synchronization algorithm in Ethernet, has very precise synchronization. IEEE 1588 uses centralized synchronization method. If a node sent to master clock fails, the synchronization performance of the remaining nodes in the network will be affected. Some of the nodes in the clock synchronization can cause paralysis of the synchronization control system. So this paper adopted the distributed synchronization method which combines the IEEE 1588 and FlexRay synchronous algorithm to realize the clock synchronization mechanism. The results show that the algorithm is more suitable for the clock synchronization in industrial communication protocol.%为了实现工业控制过程中的时钟同步,基于以太网的网络通信协议IEEE 1588标准,作为以太网中使用最广的时钟同步算法,已经具有十分精确的同步性.IEEE 1588使用集中式同步方法,导致如果有一个发送给主时钟的结点发生故障时,将会影响到网络中其余结点的同步性能,某些结点的时钟出现不同步会引起同步控制系统的瘫痪.采用把IEEE 1588与FlexRay同步算法结合的分布式同步方法实现时钟同步的机制,结果证明该算法更加适合于工业通信协议的时钟同步.