智能N取M型高可靠安全计算机系统  

Intelligent Safety-Critical Computer System with Mout of N Architecture

作　　者：周炜[1] 师进[1] 韦文[1] 孟庆尧[1] 江明[1] 

机构地区：[1]北京全路通信信号研究设计院有限公司,北京100073

出　　处：《铁路通信信号工程技术》2014年第4期1-7,共7页Railway Signalling & Communication Engineering

摘　　要：通过分析指出传统故障-安全系统在电子系统日趋复杂的背景下将遇到故障检测复杂性剧增的问题,为解决系统设计的可持续发展问题,满足用户对可靠性和安全性不断提高的需求,提出一种智能的N取M型高可靠安全计算机系统,并在系统的可靠性、安全性、设计成本、可维护性以及系统容量方面同传统安全系统进行对比分析。性能仿真数据说明新的安全计算平台不仅能够完全满足IEC61508中SIL4等级系统的要求,更重要的是,这一类型的安全计算结构极大地降低了对单器件可靠性及安全性的要求,比传统故障-安全结构在设计和维护成本方面更加具备可持续发展的潜力。This paper reveals the problem of the traditional fail-safe system in failure detection complexitywith a sharp increase because of its components becoming more and more complex. In order to keep asustained development in the system design and continually promote RAMS requirements of the system,it puts forward an intelligent safety-critical computer system with M out of N architecture and gives thecomparison and analysis of this system and the traditional fail-safe system in RAMS performance andsystem capacity. The simulation results show that this system can not only satisfy the SIL4 requirementdefined in IEC61508, but also lower greatly requirements for the basic computation unit in the reliabilityand safety, so this system is more suitable for future development than the traditional fail-safe architecturein the design and maintenance cost.

关 键 词：高可靠 高安全 二乘二取二 三取二 智能退化 安全计算机 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]