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Design of Testing Period for Reliability Assessment of Numerical Control Machine Tools Considering Working Conditions
المؤلفون المشاركون
المصدر
Mathematical Problems in Engineering
العدد
المجلد 2018، العدد 2018 (31 ديسمبر/كانون الأول 2018)، ص ص. 1-8، 8ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2018-07-08
دولة النشر
مصر
عدد الصفحات
8
التخصصات الرئيسية
الملخص EN
The existing methods of determining testing period do not consider the effect of working condition covariates on reliability testing period of Numerical Control (NC) machine tools, which may lead to high-cost testing or low-precision assessment.
Aiming at the problem, a new method of determining the testing period considering working condition covariates is proposed.
The change rate of interval estimation of Mean Time between Failures (MTBF) is used as the criterion for determining the length of testing period.
The reliability model of NC machine tools is established by the Cox proportional hazards model, and the two-step estimation method is used to estimate parameters of the baseline failure rate function and the coefficients of working condition covariates.
The Bootstrap resamples are obtained by the Bootstrap resampling method.
And then the parameters of the baseline failure rate function and the coefficients of working condition covariates are estimated simultaneously by maximum likelihood method, and thus interval estimations of MTBF under each covariate are obtained.
The change rate models of MTBF interval estimation under each covariate level are established by Power function, and the testing periods under each covariate are obtained.
Case study indicates that the testing periods under each covariate obtained by the proposed method are more accurate than those obtained by the others, when the same criterion and confidence level 1-α are set.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Li, Hongzhou& Lixia, Sun. 2018. Design of Testing Period for Reliability Assessment of Numerical Control Machine Tools Considering Working Conditions. Mathematical Problems in Engineering،Vol. 2018, no. 2018, pp.1-8.
https://search.emarefa.net/detail/BIM-1205971
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Li, Hongzhou& Lixia, Sun. Design of Testing Period for Reliability Assessment of Numerical Control Machine Tools Considering Working Conditions. Mathematical Problems in Engineering No. 2018 (2018), pp.1-8.
https://search.emarefa.net/detail/BIM-1205971
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Li, Hongzhou& Lixia, Sun. Design of Testing Period for Reliability Assessment of Numerical Control Machine Tools Considering Working Conditions. Mathematical Problems in Engineering. 2018. Vol. 2018, no. 2018, pp.1-8.
https://search.emarefa.net/detail/BIM-1205971
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1205971
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
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