恒定应力加速退化试验中避免伪寿命分布误指定的一种建模方法

为了避免恒定应力加速退化试验(CSADT)中伪寿命分布类型误指定的发生，提出了基于退化轨迹参数折算的建模方法。区别于传统建模方法对寿命分布模型的参数进行加速建模的做法，提出的建模方法对退化轨迹函数的参数进行加速建模, 以获取所有样品在工作应力下的伪寿命值从而可以准确辨识其分布类型。通过某型碳膜电阻CSADT数据对所提方法进行了实例应用，研究结果表明所提方法有效解决了伪寿命分布误指定问题。

A Reliability Modeling Approach to Avoiding Mis-specification of Pseudo Life Distribution in CSADT

A reliability modeling approach based on parameter conversion is proposed to avoid the mis-specification of pseudo-life distribution in constant stress accelerated degradation test (CSADT). The proposed method models the parameters of degradation path functions. It is different from the traditional method that models the parameters of distribution functions. The pseudo life of all samples under the working stress is evaluated, and the distribution type can be accurately identified. A application example with the CSADT data of carbon-film resistors is provided. The research results show that the proposed method can effectively resolve the problem of mis-specification of pseudo-life distribution.