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CSME 2022/04
Volume 43 No.2
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107-115
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Fusion Method of Median Estimate and Huber M Estimate on Dynamic Performance Variation of Ball of Rolling Bearing
Yongzhi Xu a, Xintao Xia b and Zixin Tian a
aCollege of Applied Engineering, Henan University of Science and Technology, Sanmenxia 472000, China; Sanmenxia Polytechnic, Sanmenxia 472000, China.
bSchool of Mechatronical Engineering, Henan University of Science and Technology, Luoyang 471003, China.
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Abstract:
Performance degradation of rolling bearing belongs to poor information on unknown distribution test data. It has an important impact for the reliability and safety of the running of mechanical equipment. The paper provides a method to assess dynamic performance variation of rolling bearing, which belongs to the field of performance degradation. Based on robustness theory and fusion theory, fusion method of median estimate and the Huber M estimate is proposed to analyze robust characteristics of the test data of rolling bearing. Attaining to intrinsic interval, variation rate, median and mean on robust data constructs assessment system of dynamic performance variation of rolling bearing on the basis of the method. For the analysis of vibration data of rolling bearings due to effect of different groove raceway damaging diameter of inner ring, results show the change trend of variation rate, median and mean on robust data of vibration is in agreement with change of groove raceway damaging diameter of inner ring. This shows that variation rate, median and mean on robust data of vibration can quantitativecharacterize dynamic performance degradation ofgroove raceway damaging diameter of inner ring onrolling bearing. Moreover, variation rate is 89%, inagreement with 0.7112mm on attaining to 89% diameter of failure condition. This shows that variation rate can effectively assess running condition of rolling bearings. This method does not require distribution types and significance level of test data. It provides a valuable solution for problems of test data of the unknown distribution and significance level. At the same time the method solves determination of boundary value of Huber M estimate in modern statistics. Evidence of the judge of dynamic performance degradation of rolling bearing is provided.
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Keywords: fusion method of median estimate and Huber M estimate, dynamic performance variation, variation rate, unknown distribution and significance level, dynamic performance degradation
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*Corresponding author; e-mail: xiaxt1957@163.com
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©
2022
CSME , ISSN 0257-9731
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