Hierarchical Method of Fault Diagnosis Based on Extended SDG
Compared with the traditional signed directed graph(SDG)model,the extended SDG model can enlarge the information of edges and nodes,reduce false solution and improve resolution.Therefore,it possesses good information completeness.However,the multi-node information and complex relationships of edges in the model result in a long search time and low efficiency.To solve these problems,a hierarchical method of fault diagnosis based on extended SDG is proposed.According to the qualitative relationship of fault propagation path between nodes,the fault source nodes can be found by backtracking alarm nodes and searching compatible branches.In this paper,the chlorine gas pump of the chemical process is used as an example to carry out modeling and reasoning in fault diagnosis.The results show that this diagnosis algorithm is not only feasible in improving the search efficiency of fault sources,but is also accurate and valuable.
Fault Diagnosis Hierarchical Directed Graph Extended SDG
Yingjie Liu Gang Xie Yunyun Yang Zehua Chen Qinglong Chai
College of Information Engineering,Taiyuan University of Technology,Taiyuan 030024
国际会议
长沙
英文
3808-3812
2014-05-31（万方平台首次上网日期，不代表论文的发表时间）