基于比例危险退化建模的产品可靠性评估方法

摘要

针对监测到产品一维性能退化数据,引入比例危险模型来描述产品寿命与退化量失效率之间的关系,建立比例危险退化模型,进而外推出产品的可靠度函数;采用AD检验方法来确定退化量分布模型;选取各监测时刻上退化量分布类型较多的分布为基准分布,确定退化量基准失效率函数及其比例系数;结合某激光器退化数据的实例分析,验证了所建模型的正确性和有效性.%Aiming at the observed degradation data of the one-dimensional performance of the products,the proportional hazard model is applied to describe the relationship between the product's life span and its degradation failure rate.The proportional hazard degradation model is built to derive the product's reliability function.The Anderson-Darling (AD) test method is used to determine the degradation distribution model.The most common degradation distribution type at the time points of observing is chosen as the basic distribution to obtain its basic failure rate function and the proportional coefficients.An example is given by using the degradation data of a certain laser to verify the effectiveness of the proposed model.