Fault tree generation and analysis based on extended SysML model

This paper proposes an extension of the SysML safety semantic approach to address the lack of safety and reliability semantics and the support for safety and reliability analysis of the model in SysML. On this basis, fault tree generation and analysis are performed. The method first adds semantic information about fault tree and redundant module to the model using the Stereotype extension mechanism, integrating design data and safety data through an extended configuration file in the SysML model. Secondly, sub-mode decomposition of Internal Block Diagram is conducted, and fault mode recognition is described in relation to fault tree mapping. Based on this, a search is conducted on the SysML model to obtain necessary information for fault tree generation, followed by an analysis of the generated fault tree.