The Study for Obtaining the Life Data of High Reliability Products by Accelerated Life Testing

Abstract

This paper presents experimental analysis of the accelerated life testing (ALT) by conducting a series of tests on 8025 brushless DC fan under combined stress of high temperature and high operating voltage. It is the first time to estimate the average life and reliability distribution for the 8025 DC brushless fan through the ALT experiment by applying combined severe stress. Comparing to conventional method applied only one stress in ALT, the approach of combined stress is much more advanced and reliable. Under different severe conditions the high accelerated rate of life test is obtained consequently with the advantages of reducing testing period and cost significantly. All of the estimated experiment data can be accepted by K-S test with the 90% significance level indicating that the estimations about operating life of the subject are highly precise at testing environments. Through the analysis, the key coefficients of Combination model applied on 8025 DC brushless fan are obtained as Ea=0.67 and N=1.67. Consequently, the lifetime of 8025 brushless DC fan is predicted.