Importance measures in reliability systems are used to identify weak components in contributing to a proper function of the system. Traditional importance measures mainly concerned the changing value of the system rel...Importance measures in reliability systems are used to identify weak components in contributing to a proper function of the system. Traditional importance measures mainly concerned the changing value of the system reliability caused by the change of the reliability of the component, and seldom considered the joint effect of the probability distribution, improvement rate of the object component. This paper studies the rate of the system reliability upgrading with an improvement of the component reliability for the multi-state consecutive k-out-of-n system. To verify the multi-state consecutive k-out-of-n system reliability upgrading by improving one component based on its improvement rate, an increasing potential importance （IPI） and its physical meaning are described at first. Secondly, the relationship between the IPI and Birnbaum importance measures are discussed. And the IPI for some different improvement actions of the component is further discussed. Thirdly, the characteristics of the IPI are analyzed. Finally, an application to an oil pipeline system is given.展开更多
故障树分析法(Fault Tree Analysis,FTA),是一种将系统失效形成的原因由总体至部分按树枝状逐级细化的分析方法,可以简化系统结构,降低可靠性及重要度的计算复杂程度。文中以共因失效系统(Common Cause Failure System,CCF)作为研究对象...故障树分析法(Fault Tree Analysis,FTA),是一种将系统失效形成的原因由总体至部分按树枝状逐级细化的分析方法,可以简化系统结构,降低可靠性及重要度的计算复杂程度。文中以共因失效系统(Common Cause Failure System,CCF)作为研究对象,基于FTA方法,给出了系统结构通过各种不同的逻辑门(与门、或门、非门等)转化为故障树的表示方法,并提出了基于故障树的系统可靠性和Birnbaum重要度的隐式替代算法,最后针对串联和并联案例分别进行了系统可靠性及Birnbaum重要度的计算,结果验证了基于故障树方法计算系统可靠性和重要度的可行性。展开更多
基金supported by the National Natural Science Foundation of China (71271170 71101116)+1 种基金the National High Technology Research and Development Program of China (863 Progrom) (2012AA040914)the Basic Research Foundation of Northwestern Polytechnical University (JC20120228)
文摘Importance measures in reliability systems are used to identify weak components in contributing to a proper function of the system. Traditional importance measures mainly concerned the changing value of the system reliability caused by the change of the reliability of the component, and seldom considered the joint effect of the probability distribution, improvement rate of the object component. This paper studies the rate of the system reliability upgrading with an improvement of the component reliability for the multi-state consecutive k-out-of-n system. To verify the multi-state consecutive k-out-of-n system reliability upgrading by improving one component based on its improvement rate, an increasing potential importance （IPI） and its physical meaning are described at first. Secondly, the relationship between the IPI and Birnbaum importance measures are discussed. And the IPI for some different improvement actions of the component is further discussed. Thirdly, the characteristics of the IPI are analyzed. Finally, an application to an oil pipeline system is given.
文摘故障树分析法(Fault Tree Analysis,FTA),是一种将系统失效形成的原因由总体至部分按树枝状逐级细化的分析方法,可以简化系统结构,降低可靠性及重要度的计算复杂程度。文中以共因失效系统(Common Cause Failure System,CCF)作为研究对象,基于FTA方法,给出了系统结构通过各种不同的逻辑门(与门、或门、非门等)转化为故障树的表示方法,并提出了基于故障树的系统可靠性和Birnbaum重要度的隐式替代算法,最后针对串联和并联案例分别进行了系统可靠性及Birnbaum重要度的计算,结果验证了基于故障树方法计算系统可靠性和重要度的可行性。
