摘要
为了提高测控网络的时钟同步精度,在现有IEEE 1588协议的网络时钟基础上,提出基于自回归算法的时钟同步设计。通过建立自回归时钟漂移模型,利用一阶卡尔曼滤波器对主从时钟的时钟偏差和漂移进行估计,根据估计值对时钟进行补偿和修正,并在测控网络失去最高主时钟信号的情况下,预测时钟漂移量以维持主从时钟同步。试验结果表明,该设计能有效降低时间戳获取精度对时钟同步的影响,使同步精度达到10 ns,并提高了系统在离线状态下的同步可靠性。
On the basis of the network clock conforming IEEE 1588 protocol,the clock synchronization design based on autoregression algorithm is proposed to improve the clock synchronization precision of the measurement and control network. By establishing the autoregression clock offset model,the one-order Kalman filter is used to estimate the clock offset and drift of the master-slave clock. According to the estimation value,the clock is compensated and corrected,and the clock drift is predicted to maintain the synchronization of master-slave clock when the highest signal of master clock is lost in the measurement and control network. The experimental results show that the design can effectively reduce the influence of timestamp acquisition accuracy on clock synchronization,make the clock synchronization accuracy reach up to 10 ns,and improve the system synchronization reliability at offline state.
作者
高海英
朱望纯
高志昊
薛文忠
GAO Haiying;ZHU Wangchun;GAO Zhihao;XUE Wenzhong(Department of Teaching and Practice,Guilin University of Electronic Technology,Guilin 541004,China;School of Electronic Engineering and Automation,Guilin University of Electronic Technology,Guilin 541004,China;Representative Office Stationed in 801 Factory,Liuzhou 545000,China)
出处
《现代电子技术》
北大核心
2018年第13期100-105,共6页
Modern Electronics Technique
基金
广西自然科学基金项目(2013GXNSFAA019332)
广西自动检测技术与仪器重点实验室基金项目(YQ16111)。
关键词
时钟同步
IEEE
1588协议
自回归
卡尔曼滤波
时钟漂移预测
测控网络
clock synchronization
IEEE 1588 protocol
autoregression
Kalman filtering
clock drift prediction
measurement and control network
