摘要
采用二参数威布尔对某系列数控机床进行可靠性评价,认为位置参数t=0。实际上,根据现场获得的数据,首次故障时间并不为零,在二参数威布尔分布可靠性评价的基础上,又提出三参数威布尔分布的可靠性评价,可以更精确地反映出数控机床的各项指标。
Two Weibull distributions are used to evaluate a certain serial CNC lathes with position parameter t = 0. In fact, the first failure time is not zero according to the data on the spot. Three Weibull distributions are put forward to evaluate the reliability on the basis of two Weibull distributions which can accurately reflect the quality index of CNC lathes.
出处
《现代制造工程》
CSCD
2007年第5期18-20,共3页
Modern Manufacturing Engineering
基金
国家"十五"科技攻关项目(2001BA203B13-02)
关键词
威布尔分布
数控机床
可靠性评价
假设检验
参数估计
Weibull distribution
CNC lathes
Reliability evaluation
Hypothesis test
Parameter estimation
