摘要
在DCS系统的可靠性分析中,共因故障会对其造成不可忽略的影响。针对这一问题,对考虑共因故障的三重模件冗余分布式控制系统进行了可靠性研究。在考虑多种共因故障模式的前提下,建立基于三重模件冗余的分布式控制系统可靠性模型和马尔可夫模型;通过Matlab进行模型仿真,分析了故障检测率、修正率、故障因子对可靠性的影响,证明该系统具有较高的可靠性。根据分析得知减少共因故障和增大设备的检测覆盖率会使基于三重模件冗余的分布式控制系统的可靠性有明显的提高,风险降低因子提升一个数量级。
In the reliability analysis of DCS system,the common cause failures will cause a non-negligible impact on DCS system.In terms of that problem,the reliability of triple modular redundancy（TMR）distributed control system with common failures was studied.Considering various common cause failure modes,the distributed control system reliability model and Markov model based on TMR were set up.The impact of fault detection rate,correction rate and failure factor on the reliability was analyzed with model simulation by Matlab,which proved that the system had higher reliability.According to the analysis,the reduction of common cause failures and the increase of equipment detection coverage obviously improve the reliability of the distributed control system based on TMR and risk reduction factor is improved by an order of magnitude.
作者
杨明极
曲祉双
YANG Mingji;QU Zhishuang(School of Measure-control Technology and Communication Engineering, Harbin University of Science and Technology, Harbin 150080, China)
出处
《大连工业大学学报》
CAS
北大核心
2018年第2期146-151,共6页
Journal of Dalian Polytechnic University
