Synchronization method for distributed systems with functional safety

被引：0
作者：
Azketa E. [1 ]
Mendialdua X. [1 ]
Ibarguren I. [1 ]
Solís A. [1 ]
机构：
[1] Ikerlan Technology Research Centre, Basque Research and Technology Alliance (BRTA), P.ºJ.M. Arizmendiarrieta, 2., Arrasate/Mondragón
来源：
RIAI - Revista Iberoamericana de Automatica e Informatica Industrial | 2021年 / 18卷 / 02期
关键词：
Clock synchronization; Distributed systems; Functional safety; Redundancy;
D O I：
10.4995/RIAI.2020.14022
中图分类号：
学科分类号：
摘要：
Time synchronization is a key requirement in several application domains based on real-time distributed systems. Therefore, it is a research area of interest, especially in lines such as the transfer of time and frequency, the design of clocks and oscillators, and the use of synchronization in communication networks. This work focuses on the transfer of time between elements of a distributed system for the synchronization of their clocks and the software they execute. Currently, there are different protocols to synchronize autonomous nodes, but they have some drawbacks that make them unsuitable for certain types of distributed systems. This paper presents a method for synchronizing the execution of distributed software on a local area network. Additionally, the functional safety analysis of the method is developed and the measures it must implement to achieve a SIL2 are proposed. The method has been implemented and validated by executing it in a realistic physical distributed system, obtaining promising results. © 2021 Universitat Politecnica de Valencia. All rights reserved.
引用
收藏
页码：113 / 118
页数：5
相关论文
共 13 条
  • [1] Eidson J. C., Measurement, Control, and Communication Using IEEE 1588 (Advances in Industrial Control), (2006)
  • [2] EN 50159: Railway applications - Communication, signalling and processing systems - Safety-related communication in transmission systems, (2011)
  • [3] EN 50128: Railway applications - Communication, signalling and processing systems - Software for railway control and protection systems, (2012)
  • [4] Hofmann-Wellenhof B., Lichtenegger H., Wasle E., GNSS–global navigation satellite systems: GPS, GLONASS, Galileo, and more, (2007)
  • [5] IEC 62061: Safety of machinery - Functional safety of safety-related electrical, electronic and programmable electronic control systems, (2005)
  • [6] IEC 61508: Functional safety of electrical/electronic/ programmable electronic safety-related systems, (2010)
  • [7] IEC 62304: Medical device software - Software life cycle processes, (2015)
  • [8] ISO 26262: Road vehicles - Functional safety, (2018)
  • [9] Levesque M., Tipper D., A survey of clock synchronization over packet-switched networks, IEEE Communications Surveys & Tutorials, 18, 4, pp. 2926-2947, (2016)
  • [10] Mills D. L., Computer Network Time Synchronization: The Network Time Protocol on Earth and in Space, (2010)
12