The failure propagation analysis of flight control system based on D-higraph

determining the failure propagation paths is always an important content of safety analysis. The traditional safety analysis methods are hard to deal with large complex systems. Therefore, model-based safety analysis (MBSA) becomes increasingly popular. However, the existing modeling methodologies are mainly modeled from one of the following three aspects, function, structure and state. This lacking of unified modeling results in low degree of information integration between models and it is prone to lose information between the conversions of different types of models. D-higraph is a new modeling formalism to capture structure as well as functionality of a system. This paper proposes a failure propagation analysis method based on D-higraph.