控制系统冗余可靠性体系研究

发布时间：2018-01-06 01:25

本文关键词：控制系统冗余可靠性体系研究　出处：《内蒙古大学》2017年硕士论文　论文类型：学位论文

【摘要】：在控制系统不断发展的过程中,对系统、设备等的可靠性考量越来越看重,在诸多的工控现场,高可靠性已成为考核系统性能的重点指标。所以,容错技术对生产是否能够具有连续性,控制系统能否可靠和有效运行的首选方法。冗余,变为一个控制系统设计之初高可靠性设计中考量的必选项。因此,本课题的研究具有一定的理论意义和现实价值。本文论述了控制系统可靠性的原始定义,控制系统可靠性的量化指标,分析了典型的冗余结构及可靠性评价依据;收集、归纳并总结了控制系统,特别基于控制器冗余的基本结构下可靠性指标的主要计算方法;在完成理论基础的研究与学习之后,选择了合适本文研究的两种建模方法:Markov建模法、Petri网建模法,对两种方法的理论概念做了详细研究。在理论深入研究的基础上,设计了三种典型冗余结构:三模混合冗余、带热备的和双机实时比较的系统,分别用Markov建模法和Petri网建模法计算可靠性的数据指标,进行横向和纵向比较;在可修系统评价体系下进行分析总结并提出一种可实施方案,通过举出现实中存在的相关冗余系统案例,印证和验证了所提方案的合理性。文章对系统的基本原理、结构模型、工作方式以及评估体系做了深度研究之后,跳出单一的系统计算和设计,通过对冗余结构设计,并用不同的两种方法进行三种冗余结构系统的可靠性计算,分析了得到的可靠性的结果,根据分析,提出以此为依据的冗余系统可靠性评估实施方案。
[Abstract]:In the process of the development of the control system, the system reliability of the equipment, and other considerations become increasingly valued, in many industrial control field, high reliability has become a key index evaluation system performance. Therefore, the fault-tolerant technology on the production can be continuous, the control method of choice whether reliable and effective operation of the system. The redundant, variable a control system design at the beginning of the high reliability design of senior high school entrance examination amount of necessary option. Therefore, this research has certain theoretical significance and practical value. This paper discusses the original definition of the reliability of the control system, control system reliability index, analyzes the redundancy structure and reliability evaluation based on typical collection, induction; and summarizes the control system, especially the main calculation method of reliability index of the basic structure of the redundant controllers based on the theoretical basis of research; after completion of the selection and learning. Two choose the appropriate modeling method of this paper: Markov modeling method and modeling method of Petri net theory, the concept of two kinds of methods are studied in detail. Based on the thorough study of the theory, the design of three typical redundant structure: the third mock exam system with hybrid redundancy hot standby and dual time comparison, data were calculated by Markov index reliability modeling method and Petri net modeling method, horizontal and vertical comparison; analyzed and proposed an implementation scheme in repairable system evaluation system, redundant system by case cited in existence, confirm and validates the rationality of the basic principle. And the system structure model, after the work mode and evaluation system to do in-depth research, out of the calculation and design of a single system, through the design of redundant structure, and three kinds of redundancy by two different methods The reliability calculation of the structural system is calculated and the results of the reliability are analyzed. According to the analysis, the implementation scheme of the reliability evaluation of the redundant system based on this is proposed.

【学位授予单位】：内蒙古大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP273

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