基于广义强度分布理论的小子样可靠性分析方法研究

项目名称： 基于广义强度分布理论的小子样可靠性分析方法研究

项目编号： No.11501022

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 数理科学和化学

项目作者： 张勇波

作者单位： 北京航空航天大学

项目金额： 17万元

中文摘要： 如何在小子样条件下评估高可靠长寿命产品的可靠性是目前可靠性工程领域亟待解决的重要问题. 本项目拟建立广义强度分布理论，通过与加速试验技术和性能退化数据的可靠性分析方法相互结合, 得到小子样条件下的可靠性分析理论。. 研究内容包含三个方面：1）小子样加速寿命试验可靠性分析方法研究。基于广义强度分布理论，改进需多个应力水平大量失效数据的分析方法，直接建立任意两应力水平下寿命之间的转换关系，在保证评估精度的同时实现小子样条件的可靠性评估; 2)建立性能退化数据的小子样可靠性分析方法。通过广义强度分布理论建立任意两时刻间退化量分布与产品寿命分布关系模型，改进需大量试验数据的退化轨迹模型，实现小子样可靠性评估；3）通过某型号红外探测器加速寿命试验对本项目方法进行试验验证与完善。. 项目研究成果对解决小子样高可靠长寿命产品可靠性评估问题具有一定的理论意义和工程价值。

中文关键词： 可靠性评估；小样本；加速寿命试验；性能退化；广义强度

英文摘要： Reliability assessment on the products with high reliability and long life is an important problem that desiderated to be solved. The generalized strength distribution theory will be proposed to combine with accelerated test method and performance degradation analysis method. Thus, the small sample reliability assessment method based on generalized strength distribution theory would be founded.. The content of this project consists of three parts. 1)Proposing the novel reliability assessment method of accelerated life test that based on the generalized strength distribution theory; improving the accelerated model that need several stresses and a lot of failure data by constituting the life transfer relationship directly between two stress levels; achieving high level precision reliability assessment with small sample; 2）Proposing the small sample reliability assessment method for the performance degradation analysis; improving the degradation contrail model that need a lot of detect data by constituting the connection model between the distribution of degradation character and lifetime distribution that based on generalized strength distribution theory; achieving high level precision reliability assessment with small sample. 3) Validating and improving the method proposed in this project by the accelerated life test of one kind of infrared locator.. The method in this project will be worth investigation either for the basic reliability assessment theory or the engineering application, and most important for the small sample reliability assessment of products with high reliability and long life.

英文关键词： Reliability Assessment;Small sample;Accelerated life test;Performance degradation;Generalized strength