基于复合失效模式的寿命分布检验方法

产品往往受随机失效和耗损失效两种模式的双重影响,因此,构造指数威布尔分布表征该类产品的失效规律。首先,用图检验法对该类产品的寿命数据进行初步检验;其次,研究了该类产品寿命数据的极大似然估计的求解方法,进一步用伽方检验方法对寿命分布类进行了检验;最后,通过工程仿真例子说明了该方法的具体操作流程,最终验证了方法的正确性。

Life Distribution Hypothesis Testing Method Based on Complex Failure Mode

Product life is often affected by both random failure mode and degradation failure mode,thus this paper constructs the Exponential & Weibull failure distribution to reflect this failure mode. Firstly,a figure test method is used to preliminary inspect of the life data of the products;secondly,this paper researches the lifetime datas of the product by maximum likelihood estimation method ,thirdly,gamma-square test is used to determinate the for life distributions of the product;Finally,simulation example is applied to show the concrete operational procedures of this method,and verificate of the correctness of this method.