A Research on Mechanical Reliability Assessment Based on Small Sample Failure Data
SONG Mingshun
LU Wei
FANG Xinghua
Abstract："Higher reliability, less failure" features of mechanical products or system make reliability assessment more difficult. To address this problem, an evaluation method of small sample of three parameter Weibull distribution is proposed based on the data of failure of mechanical reliability. Based on the determination of life distribution model, the failure data of small sample is estimated by using the grey estimation method, and the goodness of fit test is carried out, then Bayes prior distribution obtained by Monte Carlo sample as a parameter. On this basis, the three- parameter posterior distribution can be calculated by Bayes formula, and then the system reliability, failure rate and so on are derived, to evaluate the mechanical reliability of small sample failure data more accurately. The effectiveness of the method is verified by a practical example.
Keywords：small sample failure dataWeibull distributionBayesian Monte-Carlomechanical reliability
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：7( 87-93 )