关键词: 可靠性, 计算机辅助设计, FMECA, 数据模型

Abstract:

Firstly, the requirement to Computer Aided Failure Mode, Effects and Criticality Analysis (FMECA) software is analyzed. Then main functions and architecture of the FMECA software based on Reliability, Safety, Maintainability, Testability, Logistics (RSMTL)-CAD Framework are described. Two issues in the development process of the software are discussed. 1) After analyzing interrelation of FMECA results, a flexible and open data model based on Object Oriented Method is presented. Through using the hierarchy and property set, the model describes four relations of FMECA result data, that is, the dependency of various FMECA results, causality of the failure modes of products from different indenture levels, organization of FMECA results at different analysis initial indenture levels of the same product and the version management of FMECA result. 2) Equivalence Relation is used to describe the reference relations among the tools of RSMTL-CAD. The software runs in Client/Server mode and can be operated in networks and multi-user environments.

Key words: reliability, computer aided design, FM ECA, data modeling