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为了解决加速退化试验中产品失效机理一致性判别难题,以Gamma退化模型为研究对象,提出了基于加速系数不变原则的失效机理一致性判别方法.在阐明失效机理一致性判别理论依据的基础上,引入加速系数不变原则推导出Gamma过程的参数在不同应力下应满足的变化规律,利用t统计量对参数一致性进行检验以判别失效机理是否一致.通过仿真试验和实例应用验证了所提的方法,研究结论显示所提方法具有良好的工程应用性.
In order to solve the problem of the consistency of product failure mechanism in accelerated degradation tests, a Gamma regression model was proposed to identify the consistency of failure mechanism based on the principle of constant accelerating factor. On the basis of clarifying the theoretical basis of consistency determination of failure mechanism, , The principle of invariable accelerating coefficient was introduced to deduce the variation law of parameters of Gamma process under different stresses and the t-statistic was used to test the consistency of parameters to judge whether the failure mechanism is consistent.It is proved by the simulation experiment and the practical application The results show that the proposed method has good engineering applicability.