Failure-mode importance measures in system reliability analysis

Changcong Zhou; Zhenzhou Lu; Bo Ren; Baoshan Cheng

doi:10.1061/(ASCE)EM.1943-7889.0000798

Failure-mode importance measures in system reliability analysis

Changcong Zhou, Zhenzhou Lu, Bo Ren, Baoshan Cheng

School of Aeronautics

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

To quantitatively estimate the contributions of component failure modes to system output, failure-mode importance measures have been proposed in this paper. This issue is discussed in two schemes: in Scheme 1, failure-mode importance is measured by the change in the characteristics of the system output after removal of the interested failure mode; and in Scheme 2, failure-mode importance is measured by the expected change in the characteristics of the system output after fixing the failure mode of interest at nominal values. Properties and the computational strategies of the failure-mode importance measures also are presented. Discussions with numerical and engineering examples demonstrate that the importance measures are of great significance for the purpose of system improvement.

Original language	English
Article number	04014084
Journal	Journal of Engineering Mechanics
Volume	140
Issue number	11
DOIs	https://doi.org/10.1061/(ASCE)EM.1943-7889.0000798
State	Published - 1 Nov 2014

Keywords

Failure mode
Failure probability
Importance measure
Probability-density function (PDF)
System

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10.1061/(ASCE)EM.1943-7889.0000798

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AU - Lu, Zhenzhou

AU - Ren, Bo

AU - Cheng, Baoshan

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N2 - To quantitatively estimate the contributions of component failure modes to system output, failure-mode importance measures have been proposed in this paper. This issue is discussed in two schemes: in Scheme 1, failure-mode importance is measured by the change in the characteristics of the system output after removal of the interested failure mode; and in Scheme 2, failure-mode importance is measured by the expected change in the characteristics of the system output after fixing the failure mode of interest at nominal values. Properties and the computational strategies of the failure-mode importance measures also are presented. Discussions with numerical and engineering examples demonstrate that the importance measures are of great significance for the purpose of system improvement.

AB - To quantitatively estimate the contributions of component failure modes to system output, failure-mode importance measures have been proposed in this paper. This issue is discussed in two schemes: in Scheme 1, failure-mode importance is measured by the change in the characteristics of the system output after removal of the interested failure mode; and in Scheme 2, failure-mode importance is measured by the expected change in the characteristics of the system output after fixing the failure mode of interest at nominal values. Properties and the computational strategies of the failure-mode importance measures also are presented. Discussions with numerical and engineering examples demonstrate that the importance measures are of great significance for the purpose of system improvement.

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KW - Failure probability

KW - Importance measure

KW - Probability-density function (PDF)

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Failure-mode importance measures in system reliability analysis

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Keywords

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