动态系统可靠性分析的新概念

传统可靠性分析的概念只能描述静态逻辑关系,不能满足现代复杂动态系统可靠性分析的需要。在给出动态系统状态空间结构和结构函数的基础上,提出失效序列和失效丛的概念描述动态系统的故障模式,这一概念扩展了传统可靠性分析的概念,将割集、蕴含集等作为其在静态情形的特例。给出动态系统部件的概率重要度、结构重要度以及关键重要度的概念,用实例对提出的有关概念进行了说明。

New Concepts for the Dynamic System Reliability Analysis

The traditional reliability concepts aim at static logic, which are no longer satisfy the requirement of the modern complex dynamic system reliability analysis. This article provides a different state space and structural function for describing dynamic system reliability. Then concepts of failure sequence and failure cluster are defined for characterizing dynamic systems' failure mode. They are extensions of the traditional static reliability concepts such as cut set and implication set, which are the special example of the provided concepts. The analog concepts including probability importance degree, structural importance degree and critical importance degree are also put forward. At last the relative concepts are illustrated using a simple example of dynamic system.