东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2015, Vol. 36 ›› Issue (2): 245-249.DOI: 10.12068/j.issn.1005-3026.2015.02.020

• 机械工程 • 上一篇    下一篇

基于数控机床故障信息的可靠性模糊分配

张义民， 贾敬存， 黄贤振   

  1. (东北大学 机械工程与自动化学院， 辽宁 沈阳110819)
  • 收稿日期:2014-03-24 修回日期:2014-03-24 出版日期:2015-02-15 发布日期:2014-11-07
  • 通讯作者: 张义民
  • 作者简介:张义民(1958-)，男，吉林长春人，东北大学教授，博士生导师，教育部“长江学者奖励计划”特聘教授.
  • 基金资助:
    国家自然科学基金资助项目(51135003，51105062)； 国家重点基础研究发展计划项目(2014CB046303)； “高档数控机床与基础制造装备”科技重大专项(2013ZX04011-011)； 沈阳市科技计划项目(F12-082-2-00).

Reliability Allocation of CNC Machine Tools Based on Failure Information and Fuzzy Mathematics

ZHANG Yi-min， JIA Jing-cun， HUANG Xian-zhen   

  1. School of Mechanical Engineering & Automation， Northeastern University， Shenyang 110819， China.
  • Received:2014-03-24 Revised:2014-03-24 Online:2015-02-15 Published:2014-11-07
  • Contact: ZHANG Yi-min
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摘要： 提出一种基于用户反馈的数控机床故障信息的可靠性模糊分配方法.通过对某机床厂的某系列数控机床故障记录数据进行统计整理，分类得到10个子系统，对故障信息进行分布模型优选、参数估计和皮尔逊χ2法假设检验，建立整机和各子系统的故障间隔时间的可靠度函数.在分析影响机床故障间隔时间的4种因素基础上，用熵权法求解权重进行加权，引入模糊数学理论，建立机床整机故障率的分配模型，指导机床可靠性指标的再分配过程.基于故障信息的这个方法更具实际应用性，能较好地解决机床可靠性的再分配问题，提高整机系统的可靠性水平.

关键词: 数控机床, 故障信息, 模糊数学, 熵权法, 可靠性分配

Abstract: Based on the fuzzy mathematics and the failure information， a reliability allocation method for CNC machine tools was proposed. First， the fault record data of a type of CNC machine tools were sorted out， and the whole machine system was divided into ten subsystems. Then， the reliability functions for the whole system and the subsystems were established according to the statistical collation of the failure records. An allocation model of the failure rate based on the fuzzy mathematics and entropy weight methods was thus developed with four factors considered. This method can solve the reallocation of the machine’s reliability， thus enhancing the reliability of the whole system.

Key words: CNC machine tool, failure information, fuzzy mathematics, entropy weight methods；reliability allocation

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