Design And Implementation Of Fault Detection System Based On Dynamic Fault Tree

In the process of large complex system maintenance,the earlier found potential in system maintenance and solve the problem,a loss is smaller.At present in the system maintenance,due to the lack of effective theory and method support,excessive dependence on the analyst's experience,does not completely cover the system in some unexpected,unforeseen after that,the system defection retained to the system is provided to increase the difficulty of system fault detection and exclusion.As the system becomes more and more complicated,the traditional way is difficult to meet the needs of maintenance,so we need to introduce a method to meet the characteristics of system,and based on the establishment of a corresponding system and tools in order to meet the needs of the future,security of the system.Fault tree FTA(Fault Tree Analysis)is an important method of system reliability and safety analysis.Analysis and modeling technology of fault tree principle has become an important means and tools for system fault analysis based on.But for this complex system,the accuracy and consistency of the nature of the fault model,it is difficult to guarantee need,by formal methods combined with automatic reasoning correctness verification.With the increasing complexity of system structure,the fault tree has been unable to describe some of the emergence of new system failure.In order to describe the system fault in the sequence and correlation function,this paper introduces the dynamic fault tree technology is used to describe the intrinsic relationship.system fault temporal relations,and based on the dynamic fault tree model,the design and implementation of visual modeling tool based on dynamic fault tree.In order to realize the effective accumulation and sharing of knowledge and experience to meet the different types of fault,fault between knowledge reuse,the dynamic fault tree model based on the core elements of XML technology is introduced to describe the dynamic fault model and semantic,by defining the fault tree of XML Schema,to support the preservation of the fault model,read and reuse.Finally,description of the proposed dynamic fault tree technology and dynamic fault tree based on the design and implementation of the fault detection system of repair system based on dynamic fault tree,visualization modeling,fault tree storage,read,effectively improve the accumulation of system fault modeling and fault knowledge,meet the system the need to ensure the repair.