| 程铁栋,陶征亮,易其文,尹宝勇,袁海平.基于滑模控制的 IEEE1588 时钟同步算法研究[J].电子测量与仪器学报,2021,35(8):46-52 |
| 基于滑模控制的 IEEE1588 时钟同步算法研究 |
| Research on IEEE1588 clock synchronization algorithmbased on sliding mode control |
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| DOI： |
| 中文关键词: IEEE1588 时钟偏差 时钟漂移 滑模控制 滑动平均滤波 |
| 英文关键词:IEEE1588 clock skew clock drift sliding mode control moving average filter |
| 基金项目:国家自然科学基金项目(51874112)、江西省科技厅重点研发项目(20192BBEL50042)、江西理工大学研究生创新专项资金项目（ZS2020 S060）资助 |
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| 中文摘要: |
| 针对 IEEE1588 时钟同步过程中存在时钟频率漂移问题,提出了一种基于滑模控制的新型时钟同步算法。 首先根据主
从时钟偏差与漂移的递推关系,建立系统状态空间模型;然后运用滑模控制缩小时钟偏差与时钟漂移;最后结合滑动平均滤波
对实验过程中的频率抖动和随机误差进行优化。 结果表明,基于滑模控制的时钟同步算法可有效抑制时钟漂移引起的时钟偏
差线性增长,将时钟偏差控制在 1 μs 以下,从而实现亚微秒级网络对时。 相比传统 IEEE1588 协议同步方法,所提方法提供了
更高的同步精度。 |
| 英文摘要: |
| Aiming at the problem of clock frequency drift in IEEE1588 clock synchronization process, a novel clock synchronization
algorithm based on sliding mode control is proposed. Firstly, the state space model of the system is established according to the
recurrence relationship between master-slave clock offset and drift. Then, the sliding mode control is used to reduce the clock skew and
clock drift. Finally, the frequency jitter and random error in the experimental process are optimized by sliding average filter. The results
show that the clock synchronization algorithm based on sliding mode control can effectively restrain the linear growth of clock skew caused
by clock drift, and control the clock skew below 1 μs, thus, realizing sub microsecond network time synchronization. Compared with the
traditional IEEE1588 protocol synchronization method, the proposed method provides higher synchronization accuracy. |
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