A Quantitative Analysis Method Of Configurable Dynamic Fault Tree

The system is an interactive structure and functional unit,a dynamic and complex whole.With the extensive application of the system in the fields of finance,education,medical treatment and scientific research,the scale of the' system becomes larger and the structure becomes more complex.It is an important task to ensure the steady state performance and security of the complex dynamic system in the process of operation.Dynamic fault tree analysis is widely used in the reliability analysis of dynamic system because it can effectively analyze the security of the system.For the dynamic system,the traditional static fault tree cannot describe the temporal logic relation,so the dynamic fault tree introduces the dynamic logic gate to solve this problem reasonably.However,due to the lack of accurate generation method,the accuracy of dynamic fault tree is easy to be reduced during the construction of dynamic fault tree,and it is difficult to find potential problems in the modeling process,which reduces the accuracy of a series of reliability analysis results for dynamic system.In addition,because of dynamic fault tree analysis itself exists relatively complex dynamic characteristics,present a dynamic fault tree quantitative analysis of the limitations of bigger,not only need professional personnel on corresponding analysis,and involves the solution for a long time,also more difficult to achieve the requirement of high precision,so the demand of pressing area a relatively perfect dynamic fault tree quantitative analysis method.In order to effectively solve the above problems,this paper proposes a dynamic fault tree construction method based on BOM table and sub-part table.According to the automatic loading characteristics of BOM table,the generation of fault tree can be flexibly configured to ensure the reliability of the dynamic fault tree construction process.Secondly,this paper presents a dynamic fault tree quantitative analysis method based on Goodman&Weare Markov Chain Monte Carlo(GWMCMC)method,which can not only effectively improve the accuracy of dynamic fault tree quantitative analysis,but also effectively reduce the corresponding human input and improve the corresponding time efficiency.Main research contents of this paper:(1)Through system analysis,a system modeling method based on system component BOM is proposed,which can support the dynamic system modeling and has the effect of flexible configuration;(2)The GWMCMC method for quantitative analysis of dynamic fault tree for flexible configuration modeling is presented for markov monte carlo method;(3)The fault tree is divided into static and dynamic subtree independently,respectively using binary decision diagram(BBD)in combination with the way of GWMCMC,aiming at the fault tree of flexible configuration modeling,quantitative analysis and the corresponding case analysis on directional system,proved that the presented method has certain validity and feasibility.