基于故障树的系统安全风险实时监测方法

当前的安全性分析方法大都属于预先安全性分析方法,即在系统使用前对系统进行安全性分析。但系统的动态特性,如组成部件工作状态的动态变化,使系统的安全性呈现实时变化。为研究系统的实时安全风险,提出了一种基于故障树的实时安全风险监测方法。该方法用故障树表示系统结构,建立系统安全风险评估模型,根据系统的技术状态参数与系统组件工作状态的对应关系,实时对系统的安全风险进行监测;并根据安全风险监测的情况,对安全风险变化原因做出解释,做到防患于未然。用一个具有前馈控制冷却系统的例子演示了该方法的有效性。

Real-time Monitoring Method for System Safety Based on Fault Tree

Most of the current methods for safety analysis belong to the scope of safety pre-analyzing,which analyzes the system safety before system being in service.But the system safety is full of variety because of the system's dynamic characteristic,such as the running status variation of system component.In order to know well the real-time safety risk,a real-time monitoring method for system safety is proposed.The safety risk model was established on the fault tree that was used to represent logic structure of system.The real-time safety risk was monitored according to the correspondence between technical status of system component and running status of system component.Simultaneously the method could account for the change of risks,thus ensuing the taking of precautions.Finally a case monitoring the safety risk for cooling system with pre-feedback was used to demonstrate the effectiveness of the method.