Transient Fault Tolerance and System Safety Enhancement Based on System Theory
Transient Fault Tolerance and System Safety Enhancement Based on System Theory
复制标题
DOI：
10.4304/jsw.6.10.2082-2089
复制
发表时间：
2011-01
期刊：
影响因子：
--
通讯作者：
Xiongfeng Huang;Chunjie Zhou;Yuanqing Qin;Ye Wang;Mingyue Yang
中科院分区：
文献类型：
--
作者：
Xiongfeng Huang;Chunjie Zhou;Yuanqing Qin;Ye Wang;Mingyue Yang
瞬态故障具有不可预测性和持续时间短等特点，难以检测和定位，是导致系统故障的主要原因，因此在现代安全关键工业系统的开发中必须考虑瞬态容错设计。提出了一种基于系统理论的隧道施工无线监控系统（TCWMCS）瞬态故障容忍方法，该方法将瞬态故障的影响表现为软件应用程序之间交互的功能障碍。通过运行过程模型分析了系统的非功能性交互，并在功能控制图中得出了非功能性交互的原因，为设计人员提供了一种安全增强方法，即设置有效的安全约束以容忍瞬时故障。实验评估表明，瞬态故障的影响可以暴露的因果因素的功能失调的相互作用和系统的安全性可以通过实施适当的约束。
Transient faults are hard to be detected and located due to their unpredictable nature and short duration, and they are the dominant causations of system failures, which makes it necessary to consider transient fault-tolerant design in the development of modern safety-critical industrial system. In this paper an approach based on system theory is proposed to tolerate the transient faults in tunnel construction wireless monitoring and control systems (TCWMCS), in which the effects of transient faults are expressed by dysfunction of interactions among software applications. After analyzing the dysfunctional interactions of the system by the operational process model and educing the causes of dysfunction in the functional control diagram, a safety enhancement way was proposed for the designers, in which effictive safety constraints were set up to tolerate the transient faults. The experiment evaluation indicated that the effects of transient faults could be exposed by the causal factors of dysfunctional interactions and system safety could be enhanced by the enforcement of appropriate constraints.