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

China Mechanical Engineering ›› 2011, Vol. 22 ›› Issue (22): 2735-2738.

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

Dai Yi

Tianjin University of Technology and Education, Tianjin, 300222

Online:2011-11-25 Published:2011-12-12
Supported by:

National Natural Science Foundation of China（No. 50875186）;
National Science and Technology Major Project ( No. 2009ZX04014-013)

基于指数分布的数控机床可靠性评估优化方案

戴怡

天津职业技术师范大学，天津，300222

基金资助:
国家自然科学基金资助项目(50875186)；国家科技重大专项(2009ZX04014-013)
National Natural Science Foundation of China（No. 50875186）;
National Science and Technology Major Project ( No. 2009ZX04014-013)

Abstract

Abstract:

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. 

Key words: NC machine tool, reliability, evaluation;timing censored lifetime test with replacement

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。

关键词:

数控机床, 可靠性, 评估, 有替换定时截尾试验

CLC Number:

TG659

DAI Yi.

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

[J]. China Mechanical Engineering, 2011, 22(22): 2735-2738.

戴怡.

基于指数分布的数控机床可靠性评估优化方案

[J]. 中国机械工程, 2011, 22(22): 2735-2738.

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

基于指数分布的数控机床可靠性评估优化方案

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