航天电子产品贮存期评估方法研究

航天电子产品具有长寿命、小子样、失效机理复杂等特点,难以通过传统的统计方法对其贮存期进行评估.通过对元器件进行加速贮存试验,给出了一种元器件的退化方程、伪失效寿命、加速因子以及激活能的计算方法,然后在元器件加速贮存试验的基础上提出了一种基于失效率的航天电子产品加速因子算法,该算法只需得到整机元器件数量、失效率激活能即可计算加速因子,最后对某控制器进行加速寿命试验,验证了所提出的贮存期评估方法的正确性以及工程适应性.

Research on evaluating the storage period of aerospace electronics products

This article proposes a method to evaluate the storage period of aerospace electronic product.Firstly,this article gives a way to calculate the component degradation equation,pseudo failure life,accelerating factor and activation energy through accelerated storage test carried out on the electronic components,and then on the basis of components accelerated storage test,an algorithm based on the failure rate of aerospace electronics accelerating factor was put forward,the algorithm only need to get the product's components number,failure rate and activation energy.In order to verify the proposed method,an accelerated life tests was carried out on a controller.