基于定数截尾样本的高档数控机床可靠性评估  

Evaluation of the reliability of high-grade CNC machine tool based on Type Ⅱ censored sample

作　　者：许嘉莉 张权[1] XU Jia-li;ZHANG Quan(College of Science,Qiqihar University,Heilongjiang Qiqihar 161000,China)

机构地区：[1]齐齐哈尔大学理学院,黑龙江齐齐哈尔161006

出　　处：《齐齐哈尔大学学报（自然科学版）》2022年第3期91-94,共4页Journal of Qiqihar University(Natural Science Edition)

基　　金：黑龙江省教育厅项目(135509127)。

摘　　要：在对某一高档数控机床进行可靠性评估时,当得到的数据为不完全的定数截尾样本,最好的建模方法就是威布尔分布,通过参数估计中的最好线性无偏估计得到威布尔模型的两参数值。并根据可靠性指标,失效率函数和平均无故障时间来对模型进行可靠性评估,从而得到该机床正处于偶然失效期,且该机床发生故障的频率稍高。In the reliability evaluation of a high-grade CNC machine tool, the best modeling method is Weibull distribution, and the data we get are incomplete Type Ⅱ censored samples. The two parameter values of Weibull model are obtained by BLUE in parameter estimation. And according to the reliability index: failure rate function and MTBF to evaluate the reliability of the model, so that the machine tool is in the accidental failure period, and the frequency of the machine tool failure is slightly higher.

关 键 词：定数截尾样本 参数估计 失效率 平均无故障时间 

分 类 号：O213.9[理学—概率论与数理统计]