摘要
基于加速寿命试验中紧缩失效阈值和加速因子的计算方法,提出虚拟失效的概念,通过建立工况折合因子关于性能退化量的函数关系,并利用工况折合因子对每一性能退化量所对应的时间进行修正,达到对产品不同工况下性能退化数据的归一化处理,为变工况下的实时可靠性评估与寿命预测提供技术支撑。
Based on the tightening failure threshold and acceleration factor learned from accelerated life tests, this study first proposes the concept virtual failure. Then the fimction of conditions conversion factor relating to the performance degradation measure is constructed to revise the time corresponding to the performance degradation measures, and to realize the degradation data normalization under variable operation conditions. The proposed method can provide technical support for the real-time reliability assessment and life prediction. Finally, the feasibility and efficiency of this method is validated by the NASA PCoE li-ion battery dataset.
出处
《自动化与信息工程》
2015年第6期23-28,共6页
Automation & Information Engineering
关键词
加速寿命试验
虚拟失效
工况折合因子
数据归一化
Accelerated Life Test
Virtual Failure
Conditions Conversion Factor
Data Normalization
