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根据寿命型随机变量的加速机理一致性条件,提出一种基于伪寿命的加速退化机理一致性边界检验方法,通过由低到高逐一对各个加速应力水平下的退化机理一致性进行检验,来确定加速退化机理一致性的边界应力水平.针对工程常用的两类寿命型分布———对数正态分布和Weibull分布,分别以对数标准差和形状参数为退化机理表征量,在产品伪寿命估计的基础上建立了退化机理表征量齐性检验的F统计量,导出了退化机理一致性检验拒绝域的解析式,给出了退化机理一致性边界检验的具体步骤.该方法能够充分利用多个应力水平下表征产品退化机理一致的横向信息,有效提高了检验的精度.以某镀膜平板玻璃热退化机理一致性边界温度的确定为例,分析说明了该方法的合理性与有效性.
According to the consistency condition of the accelerating mechanism of life-span random variables, a method based on false lifetime for consistency check of accelerated degradation mechanism is proposed, which verifies the consistency of degradation mechanisms under different accelerating stress levels from low to high Accelerate the degradation mechanism of the consistency of the boundary stress level.For the two types of life-type distribution commonly used in engineering --- logarithmic normal distribution and Weibull distribution, respectively, the standard deviation of logarithmic and shape parameters for the degradation mechanism of the amount of representation in the product pseudo life Based on the estimation, the F statistic of the homogeneous test of degenerate mechanism characterization quantity is established and the analytic formula of the degenerate mechanism consistency test rejection domain is deduced. The concrete steps of the degenerate mechanism consistency boundary test are given. This method can make full use of the multi The results show that this method is reasonable and effective when the transverse temperature information is consistent with the degradation mechanism of the product under the stress level and the accuracy of the test is effectively improved.