Study on Bearing Life Distribution Estimation Based on Super-Small Size Sample of Censoring Data  
Author Ningxiang Wu


Co-Author(s) Liyang Xie; Haiyang Li


Abstract For the situations of only 3-5 censoring product life test data, a three-parameter Weibull life probability distribution estimation method is investigated, especially the method to estimate the location parameter of the Weibull distribution. Median rank estimator is applied to get the location parameter with reference to the required confidence level. With the fundamental assumption that the bearing’s life follows a Weibull distribution with a shape parameter of 2.0, the scale parameter is estimated using the well known interval estimator after the location parameter has been known. The validity of the method is discussed, and the estimated life distribution is compared with the one estimated with two-parameter Weibull distribution, illustrating the value of the three parameter Weibull distribution method.


Keywords Life distribution, bearing, super-small sample size, censoring data
    Article #:  2492
Proceedings ISSAT International Conference on Reliability and Quality in Design 2018
August 2-4, 2018 - Toronto, Ontario, Canada