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

加速壽命測試應用於高壽命產品之數據取得研究

張清靠(Ching-Kao Chang) ； 向振良(Chen-Liang Hsiang)

《中國機械工程學刊》 31卷1期 (2010/02) Pp. 75-79

https://doi.org/10.29979/JCSME.201002.0009

摘要

本文對8025直流無刷冷卻風扇產品，選定適合的組合性加嚴應力與建構適合的模式，規劃一系列實驗來了解其大小與使用壽限的變化關係，並於加速應力測試中獲得加速壽命測試模式的相關參數，藉此得到該冷卻風扇在不同操作環境下的加速因子，進而推估其產品在正常操作條件下之壽命，以確實掌握產品的壽命特性。

並列摘要

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.

並列關鍵字

reliability ； accelerated life testing ； 8025 brushless DC fan ； acceleration factor ； Weibull distribution ； Combination model