基于不同冗余结构的PLC系统可靠性与可用性研究

冗余PLC是提高工业控制系统可靠性的重要手段,作为一种有效的容错技术已在诸多领域获得广泛应用,而在实际应用中,如何依据应用环境选择合适的冗余结构却是面临的现实问题。基于可靠性基础理论,分析了单系统、2单元并联冗余系统、3取2表决冗余及2乘2取2冗余PLC系统的可靠性及平均故障时间（MTBF）,并对比了不同冗余结构可靠度及MTBF随单元故障率的变化关系,同时分析了典型冗余结构PLC系统的可用性。研究成果为实际应用环境中冗余结构的选择提供了有效依据。...

Full description

Saved in:
Bibliographic Details
Published in电子技术应用 Vol. 42; no. 9; pp. 80 - 83
Main Author 孟君
Format Journal Article
LanguageChinese
Published 神华集团有限责任公司,北京,100011 2016
Subjects
MTBF
PLC
冗余技术
可用性
可靠性
容错技术
容错技术
PLC
可用性
reliability
fault-tolerant technology
可靠性
redundancy
availability
冗余技术
MTBF
Online AccessGet full text
ISSN0258-7998
DOI10.16157/j.issn.0258-7998.2016.09.021

Cover

More Information
Summary:冗余PLC是提高工业控制系统可靠性的重要手段,作为一种有效的容错技术已在诸多领域获得广泛应用,而在实际应用中,如何依据应用环境选择合适的冗余结构却是面临的现实问题。基于可靠性基础理论,分析了单系统、2单元并联冗余系统、3取2表决冗余及2乘2取2冗余PLC系统的可靠性及平均故障时间（MTBF）,并对比了不同冗余结构可靠度及MTBF随单元故障率的变化关系,同时分析了典型冗余结构PLC系统的可用性。研究成果为实际应用环境中冗余结构的选择提供了有效依据。
Bibliography:Meng Jun （ Shenhua Group Corporation Limited, Beijing 100011, China ）
Redundant PLC system is the important way to improve the reliability of industrial control system, which was widely used in many fields as an excellent fault- tolerant solution. However, suitable selection of redundant structure according to the prac-tical application was an inevitable problem in the actual application environment. The reliability and MTBF（ Mean Time Between Failures） of single element system, parallel redundancy, triple- module redundancy and double 2- vote- 2 redundancy system are an-alyzed based on basic reliability theories, and the relationship between reliability, MTBF and failure rate of different redundant structure were discussed. The research achievements can provide effective theoretical guide for suitable selection of redundant struc-ture in practical applications.
PLC; redundancy; reliability; MTBF; fault-tolerant technology; availability
11-2305/TN
ISSN:0258-7998
DOI:10.16157/j.issn.0258-7998.2016.09.021