A comprehensive reliability allocation method for numerical-controlled lathes based on copula function

被引：0

作者：

Yang Z. ^{[1
]}

Zhu Y.-P. ^{[1
]}

Zhang Y.-M. ^{[1
]}

Ren H.-R. ^{[1
]}

机构：

[1] School of Mechanical Engineering and Automation, Northeastern University, Shenyang, 110819, Liaoning

来源：

Binggong Xuebao/Acta Armamentarii | 2016年 / 37卷 / 01期

关键词：

Comprehensive reliability allocation; Failure correlation; Failure mode and effects analysis; Machine tool technology; Reliability; Series system;

D O I：

10.3969/j.issn.1000-1093.2016.01.020

中图分类号：

学科分类号：

摘要：

An allocation method which considers fault correlation is proposed for the reliability allocation of series systems based on the non-linear transform functions of failure mode and effects analysis (FMEA). In consideration of the multiple factors that affect the reliability allocation, an reliability allocation matrix is established by employing the significance factors. The non-linear transform laws of failure severity and failure frequency are established to address the limitation of FMEA. A coefficient matrix of fault correlation is established based on Gumbel Copula function and Kendall correlation coefficients, and the correlated failure severities of subsystems are calculated. The equation of calculating the reliability of series system is derived based on Copula function. This equation is employed to guide the reliability allocation. Finally, the characteristics of the method are analyzed by taking a spindle system of a computerized numerical controlled (CNC) lathe for example. The allocation results are compared, which consideres dependent and independentfaults of subsystems. The result shows that the the allocation method with fault correlation can be used to provide the lower reliability allocation of subsystems, thus reducing the processing and maintenance costs. © 2016, China Ordnance Society. All right reserved.

引用

页码：131 / 140

页数：9

共 18 条

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