System reliability evaluation method considering physical dependency with FMT and BDD analytical algorithm

• 作者: CHEN Ying WANG Yanfang YANG Song KANG Rui
• 来源期刊: 系统工程与电子技术（英文版）
• 年，卷（期）: 2022,（1）
• 所属期刊栏目: RELIABILITY
• 页码范围: 222-232
• 页数: 11页
• 语种: 英文
• DOI: 10.23919/JSEE.2022.000022

摘要

Recently,the physics-of-failure(PoF)method has been more and more popular in engineering to understand the failure mechanisms(FMs)of products.However,due to the lack of system modeling methods and problem-solving algorithms,the information of FMs cannot be used to evaluate system reli-ability.This paper presents a system reliability evaluation me-thod with failure mechanism tree(FMT)considering physical de-pendency(PDEP)such as competition,trigger,acceleration,in-hibition,damage accumulation,and parameter combination.And the binary decision diagram(BDD)analytical algorithm is de-veloped to establish a system reliability model.The operation rules of ite operators for generating BDD are discussed.The flow chart of system reliability evaluation method based on FMT and BDD is proposed.The proposed method is applied in the case of an electronic controller drive unit.Results show that the method is effective to evaluate system reliability from the perspective of FM.