分布式控制系统的时钟同步研究

Clock Synchronization Algorithm in Distributed Control Systems

在分布式控制系统中测量设备需要一个精确的实时时钟,但是由于没有全局的时钟节拍,使系统很难达到毫秒级的同步,提出了一种应用在总线上的时钟同步协议,并且以CAN总线为例,分析了如何把“后期协商”时钟同步算法应用于CAN总线中,并且提出了一种改进的容错性“后期协商”同步算法,此算法提供了一定的容错能力,减少了同步开销。

The measurement devices in distributed control systems require a real-time clock with a high accuracy,but it is difficult to arrive the accuracy of microseconds for there is no global tick.This paper offers a clock synchronization protocol on the CAN network and implements it in the lab.lt proposed an increased fault tolerant ＂later period negotiation＂ algorithm which has some fault toleration.At the same time,it can reduce the synchronization consuming.