On the Evaluation of Clock Synchronization Methods for Networked Control Systems

2013 3rd Eastern European Regional Conference on the Engineering of Computer Based Systems Pub Date : 2013-08-29 DOI:10.1109/ECBS-EERC.2013.30

Jan Pacner, Ondrej Ryavý, M. véda

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引用次数: 4

Abstract

A distribute control requires to maintain time synchronization to the degree of precision depending on a particular application domain. Many large distributed systems employ Ethernet or even full TCP/IP stack for communication. Two prevalent protocols are used for clock synchronization in these networks, in particular, Network Time Protocol (NTP) and Precise Time Protocol (PTP). In this short paper, we present a method for practical performance evaluation of clock synchronization within a distributed environment consisting of nodes running a commodity real-time operating system. The results of measurement provide us a hint on the degree of synchronization that can be practically achieved among the set of distributed devices. The main contribution of this paper is to provide a simple method for practical evaluation of synchronization methods for a distributed control system and presenting some preliminary data from the measurement. A complete result set may be used, e.g., for defining a performance estimation functions in a platform-based design approach to networked control systems.

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网络控制系统时钟同步方法的评价

分发控件需要根据特定的应用程序域维护精确程度的时间同步。许多大型分布式系统使用以太网甚至全TCP/IP栈进行通信。在这些网络中，时钟同步使用两种流行的协议，特别是网络时间协议(NTP)和精确时间协议(PTP)。在这篇短文中，我们提出了一种在分布式环境中对时钟同步进行实际性能评估的方法，该环境由运行商品实时操作系统的节点组成。测量结果为我们提供了在分布式设备之间实际可以实现的同步程度的提示。本文的主要贡献是提供了一种简单的方法来实际评估分布式控制系统的同步方法，并给出了一些初步的测量数据。可以使用完整的结果集，例如，用于定义基于平台的网络化控制系统设计方法中的性能估计函数。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2013 3rd Eastern European Regional Conference on the Engineering of Computer Based Systems

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