融合外场使用和加速寿命数据的可靠性评估方法
发布时间：2018-10-05 08:44
【摘要】：针对寿命服从双参数Weibull分布且已在外场使用一段时间后的机电产品,进行单应力、定时转换的步进加速寿命试验,研究外场使用数据和加速寿命试验数据之间的融合评估问题。考虑到外场多应力环境与实验室单一应力环境之间的差异性,构建基于修正系数的分布参数计算模型;开展融合外场使用历程和加速寿命试验过程的统计分析,建立各应力下的累计分布函数关系;构建融合过程的极大似然函数,运用数值迭代法,求解未知参数估计;结合某型机电产品进行仿真方案设计,采用蒙特卡罗仿真方法产生样本数据,通过对比分析说明本文所提出的模型评估精度更高。
[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.
【作者单位】： 空军工程大学装备管理与安全工程学院;
【基金】：总装“十二五”国防预先研究项目资助课题
【分类号】：TB114.3
，
本文编号：2252738
[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.
【作者单位】： 空军工程大学装备管理与安全工程学院;
【基金】：总装“十二五”国防预先研究项目资助课题
【分类号】：TB114.3
，
本文编号：2252738
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