Precise Clock Synchronization in Industrial Internet of Things: Networked Control Perspective

被引：0
|
作者：
Wang T. [1 ,2 ]
Xu X.-Q. [1 ,2 ]
Tang X.-M. [1 ,3 ]
Huang Q.-Q. [1 ,3 ]
Li Y.-F. [1 ,3 ]
机构：
[1] Key Laboratory of Industrial Internet of Things and Networked Control, Ministry of Education, Chongqing
[2] School of Advanced and Manufacturing Engineering, Chongqing University of Posts and Telecommunications, Chongqing
[3] School of Automation, Chongqing University of Posts and Telecommunications, Chongqing
来源：
Zidonghua Xuebao/Acta Automatica Sinica | 2021年 / 47卷 / 07期
基金：
中国国家自然科学基金;
关键词：
Industrial internet of things; Kalman filtering; Measurements loss; Precise clock synchronization;
D O I：
10.16383/j.aas.c180811
中图分类号：
学科分类号：
摘要：
In this paper, aiming at the time-varying clock parameters in the internet of things, the fully distributed scaled Kalman filtering for clock state tracking, which is different from the "relative clock modeling", has been proposed by using the point of view of the networked control theory through the essential analysis of the clock state modeling. Considering the loss of measurement, it can be extended to the modified Kalman filtering algorithm for tracking the clock parameters. We have proposed an observable state decoupling measurement model under a new MMSE (minimum mean square error) equivalent transformation based on BMU (basic measurement unit). The new measurement model is able to realize the scaled expansion of MMSE measurement, and theoretically analyze the conditions of clock synchronization and calculate the corresponding upper bound of statistical clock synchronization error, and quantify the balance between synchronization accuracy of clock and potential quality of the communication network. Copyright © 2021 Acta Automatica Sinica. All rights reserved.
引用
收藏
页码：1720 / 1738
页数：18
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