發(fā)布時(shí)間：2018-10-05 08:44

【摘要】：針對(duì)壽命服從雙參數(shù)Weibull分布且已在外場(chǎng)使用一段時(shí)間后的機(jī)電產(chǎn)品,進(jìn)行單應(yīng)力、定時(shí)轉(zhuǎn)換的步進(jìn)加速壽命試驗(yàn),研究外場(chǎng)使用數(shù)據(jù)和加速壽命試驗(yàn)數(shù)據(jù)之間的融合評(píng)估問題。考慮到外場(chǎng)多應(yīng)力環(huán)境與實(shí)驗(yàn)室單一應(yīng)力環(huán)境之間的差異性,構(gòu)建基于修正系數(shù)的分布參數(shù)計(jì)算模型;開展融合外場(chǎng)使用歷程和加速壽命試驗(yàn)過程的統(tǒng)計(jì)分析,建立各應(yīng)力下的累計(jì)分布函數(shù)關(guān)系;構(gòu)建融合過程的極大似然函數(shù),運(yùn)用數(shù)值迭代法,求解未知參數(shù)估計(jì);結(jié)合某型機(jī)電產(chǎn)品進(jìn)行仿真方案設(shè)計(jì),采用蒙特卡羅仿真方法產(chǎn)生樣本數(shù)據(jù),通過對(duì)比分析說明本文所提出的模型評(píng)估精度更高。
[Abstract]:For the mechanical and electrical products whose service life is distributed from two parameters Weibull and has been used in the field for a period of time, the step accelerated life test with single stress and timing conversion is carried out, and the fusion evaluation between the field usage data and the accelerated life test data is studied. Considering the difference between the field multi-stress environment and the laboratory single stress environment, the distribution parameter calculation model based on the correction coefficient is constructed, and the statistical analysis of the fusion of the field usage history and the accelerated life test process is carried out. The accumulative distribution function relationship under each stress is established, the maximum likelihood function of fusion process is constructed, the unknown parameter estimation is solved by numerical iteration method, and the simulation scheme is designed in combination with a certain electromechanical product. Monte-Carlo simulation method is used to generate the sample data. The comparison and analysis show that the model proposed in this paper has higher accuracy.
【作者單位】： 空軍工程大學(xué)裝備管理與安全工程學(xué)院;
【基金】：總裝“十二五”國(guó)防預(yù)先研究項(xiàng)目資助課題
【分類號(hào)】：TB114.3
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本文編號(hào)：2252738