Distribution of Time Between Failures of Numerical Control System Based on Censored Data

被引：1

作者：

Dai, Yi ^{[1
]}

Yang, Xue-zhi ^{[1
]}

Ji, Ning ^{[1
]}

机构：

[1] Tianjin Univ Technol & Educ, Sch Mech Engn, Tianjin 300222, Peoples R China

来源：

ADVANCES IN PRODUCT DEVELOPMENT AND RELIABILITY III | 2012年 / 544卷

关键词：

numerical control system; Reliability evaluation; Weibull distribution; censored data;

D O I：

10.4028/www.scientific.net/AMR.544.55

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The calculation of mean time between failures (MTBF) is of significance in reliability engineering. The precondition before calculation of MTBF is to make sure what failure model the numerical control (NC) system follows. For different distributions, the corresponding calculation methods of MTBF are always different. Undertaken a 2 year period of timing censored test with replacement of NC lathe, authors apply a type I censored likelihood function to make the distribution fitting of time between failures of NC system. The tests of goodness-of-fit applying Hollander's method demonstrate that the time between failures of NC system follows the Weibull distribution. The conclusion not only deeply analyzes the NC system failure law, but also establishes the basis of calculation for the mean time between failures of NC system based on censored data with replacement.

引用

页码：55 / 60

页数：6