Failure Propagation Model Based for System Safety Analysis

Abstract

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. INSTRUCTIONThe development of complex system is being more and more integrated, leading to the complexity of its structure, function, and communication. As a result, the system safety has become the key to the development of complex system. However, the complexity, dynamic and hybridity of the system are increasing dramatically, and bring about a challenge for safety analysis of the system.To be satisfied with the requirements, system safety analysis methods have witnessed continuous development. The existing safety analysis methods mainly divided into three categories: 1) event-based safety analysis method; 2) state-based safety analysis method; 3) safety analysis method based on failure propagation model. Even-based safety analysis method is taken the anomalies such as component fault and _____________