基于指数分布的数控机床可靠性评估优化方案  

Optimum Plan of Reliability Evaluation of NC Machine Tools Based on Exponential Distribution

作　　者：戴怡[1] 

机构地区：[1]天津职业技术师范大学,天津300222

出　　处：《中国机械工程》2011年第22期2735-2738,共4页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(50875186);国家科技重大专项(2009ZX04014-013)

摘　　要：研究了基于指数分布的数控机床可靠性评估试验方案。首先确定评估试验方案类型为有替换定时截尾试验,然后研究了为达到一定的置信区间所需要的最小失效数,并研究了试验机床数量与截尾时间乘积应满足的条件,以便获得最小失效数。最后,对最小截尾试验时间进行研究,给出了试验机床数量与截尾时间的优化方案。A reliability evaluation test plan of NC machine tools based on exponent distribution was investigated. At first the evaluation test plan type was confirmed as timing censored lifetime test with replacement, secondly the minimum failure number was discussed to get certain confidence interval, and then the condition that the product of machine tool number and censored time should satisfied was analyzed to get the minimum failure number. At last, the optimum plan about machine tool number and censored time were put forward.

关 键 词：数控机床 可靠性 评估 有替换定时截尾试验 

分 类 号：TG659[金属学及工艺—金属切削加工及机床]