Aircraft system safety analysis based on failure propagation model

The traditional safety analysis methods focus more on the critical single equipment or the critical part. It is difficult to master the causal logic relationship between the failures, thereby limiting effectiveness of the methods. This paper establishes the system failure model based on the ideology of model-based system safety analysis, and identifies and analyzes the failure modes. We make the modeling and the analysis in view of the failure model. Finally, failure propagation model is analyzed for an application example. The results show the practicability of the method by analyzing. The achievements of this study provide the basis for the safety of system design, and have the important theoretical value and practical significance.