基于失效物理的多模式耦合可靠性建模方法

电子系统由于其功能结构复杂,且工作在多载荷耦合的复杂环境条件下,导致其失效模式较多.因此,电子系统的失效更多的是多个失效模式共同作用的结果.而目前关于电子系统多模式耦合条件下的可靠性建模方法较少.针对电子系统多模式耦合条件下的可靠性建模方法进行研究.首先,通过基于失效物理的可靠性仿真分析方法获取各个单一失效模式的寿命分...

Multi mode coupling reliability modeling method based on physics of failure

The failure modes of electronic systems are various due to the complex functional structure and operation under complex environmental conditions of multi load coupling. Therefore, the malfunction of the electronic system can be regarded as the result of the mutual combination of multiple failure modes. At present, there are few reliability modeling methods considering the multi mode coupling of electronic systems. This paper studies the reliability modeling method under the condition of multi mode coupling of the electronic system. First, each failure mode''s life distribution information is obtained through the reliability simulation analysis method based on the physics of failure. Then the Copula function is utilized to establish the reliability model of the multi mode coupling system, and the reliability calculation method is given. Finally, a case study of a specific type of integrated electronic system shows that the method proposed in this paper can achieve more accurate calculation results of reliability, and avoid overly conservative in reliability assessment.