采用虚拟样本加速退化试验的复杂电子设备可靠性评估  

Reliability Assessment for Complicated Electronic Equipment with Virtual Samples of Accelerated Degradation Tests

作　　者：徐宇亮[1,2] 陈西宏[1] 孙际哲[1] 刘瑞峰[3] 范浩[3] 

机构地区：[1]空军工程大学防空反导学院 [2]中国人民解放军93655部队 [3]空军装备研究院防空所

出　　处：《西安交通大学学报》2013年第6期79-84,共6页Journal of Xi'an Jiaotong University

基　　金：国家自然科学基金资助项目(60971118)

摘　　要：对复杂电子设备进行可靠性评估时,针对退化特征量难以确定和试验样本数目有限这两方面的困难,提出了一种基于虚拟样本加速退化试验(ADT)的电子设备可靠性评估新方法。将相对贴近度的概念引入到退化监测数据的处理中,以相对贴近度为退化特征量,并对原始样本进行虚拟增广,同时对增广样本数据加以修正处理,从而形成电子设备各应力下的退化轨迹。将该方法与传统的可靠性预测方法相结合,有效地解决了加速退化试验中极少样本数据的处理问题。实例分析表明:电子设备的预测寿命与出厂时标定使用寿命的误差为5.93%,86.27%的样品设备使用寿命超过9a,说明该方法可行、有效,并大大提高了试验的效费比。For the reliability assessment of complicated electronic equipment,the thimbleful testing samples and the degradation characters data recognition become the main focuses.Thus,a new approach based on accelerated degradation tests of virtual samples is proposed.Relative nearness degree is introduced for degradation dada process,and the degradation characters data are represented by the relative nearness degree,then the original samples are expanded virtually and modified,and the degradation track of electronic equipment under various stresses is obtained.Combining the traditional reliability prediction,the difficulty of thimbleful testing sample is solved in the accelerated degradation tests.Example analysis shows that the error of the life prediction of a kind of electronic equipment is 5.93% by contrast with the factory calibrating error of service life,and the predicted service life of 86.27% samples is more than nine years,which indicates validity and higher ratio of efficiency to cost of the proposed method.

关 键 词：复杂电子设备 加速退化试验 可靠性评估 退化模型 虚拟样本 

分 类 号：TP277[自动化与计算机技术—检测技术与自动化装置] V442[自动化与计算机技术—控制科学与工程]