吉林大学学报(工学版) ›› 2017, Vol. 47 ›› Issue (1): 169-173.doi: 10.13229/j.cnki.jdxbgxb201701025

• Orginal Article • Previous Articles     Next Articles

Reliability modeling of CNC machine tools system based on failure correlation analysis

ZHANG Ying-zhi1, LIU Jin-tong1, SHEN Gui-xiang1, QI Xiao-yan1, 2, LONG Zhe1   

  1. 1.College of Mechanical Science and Engineering, Jilin University, Changchun 130022,China;
    2.Department of Aircraft and Driving Force, Aviation University of Air Force, Changchun 130022,China
  • Received:2015-11-02 Online:2017-01-20 Published:2017-01-20

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Abstract: A new technical approach is proposed for the reliability analysis of CNC machine tools system under the failure correlation. First, the component reliability models were built based on related failure mechanism analysis. Then, taking the component reliability models as the marginal distribution, the system joint reliability function was developed with the introduction of the Copula function. Third, the parameter of Copula function was estimated with the aid of Kendall rank correlation coefficient obtained from samples. Finally, a case study of machining center is carried out. Comparing with the component reliability series model and with the traditional Copula function model, the new Copula function model considering failure correlation directionality is ore rational and effective.

Key words: machine tool, failure correlation, average rank time method, reliability modeling, Copula function, Kendall rank correlation coefficient

CLC Number: 

  • TG659
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