Paper Info
Title
A reliability allocation method of mechanism considering system performance reliability.
Abstract
It is generally believed that the reliability of a mechanical system is determined by its composition. The system operates properly when all of its components do not fail. Based on this assumption, the reliability of the system can be represented by the reliability of its components. A problem arises when applying this hypothesis to a system containing motion mechanisms. There is a phenomenon in motion mechanism that the components do not happen structural failure (we call it "Type I failure") and joint failure (we call it "Type II failure"), but the function of the mechanism cannot meet the requirements (we call it "Type III failure"). A reliability allocation method, which synthetically considers the composition and Type III failure modes of the motion mechanism, is proposed to solve this problem. A relative dispersion factor is introduced to describe the failure dependence of components and is proposed to calculate the complexity and criticality. A series system reliability allocation model considering three types of failure modes is established. Finally, using an airplane gear door lock mechanism as an example, a comparative analysis of the system reliability allocation results with and without considering Type III failure modes is made. The allocation results show the component reliability value without considering Type III failure modes is less than that when considering them, which will increase the system hazards. The result considering Type III failure modes is more reasonable than that from the traditional method.
Year
DOI
Venue
2019
10.1002/qre.2500
QUALITY AND RELIABILITY ENGINEERING INTERNATIONAL
Keywords
Field
DocType
complexity,criticality,motion mechanism,reliability allocation,system function
Econometrics,Engineering,Criticality,Reliability engineering
Journal
Volume
Issue
ISSN
35.0
7.0
0748-8017
Citations 
PageRank 
References 
0
0.34
0
Authors
3
Name
Order
Citations
PageRank
Yugang Zhang100.34
Tianxiang Yu200.34
Bifeng Song3139.70