Hierarchy Fault Diagnosis Based on Signed Directed Graphs Model
The signed directed graph (SDG) has been widely applied in the fault diagnosis. However, the structure of SDG is so complicated especially when it is used to describe a complex system. As a result, this will lead to the problem of combinatorial explosion and has limited SDG to the realistic application. To solve this problem, we present an improved SDG faults diagnosis algorithm in this paper. When the SDG is established, the adjacency matrix will be obtained; then by Warshall algorithm, the reachable matrix is derived. After that, four diagnosis methods for selecting optimal measuring points are developed which avoid inefficient testing in diagnosis process to increase diagnosis efficiency. Finally the hierarchical techniques, constraint propagation, intermediate optimization and the fault backward reasoning of SDG are combined to locate the fault of the system. The methodology is applied to a centrifugal pump and liquid level system for a thermal power plant. The experiment results prove its feasibility and efficiency.
Signed Directed Graph(SDG) Matrix Optimal Measuring Point Fault Diagnosis
Xie Gang Liu Jing Chen Zehua
College of Information Engineering, Taiyuan University of Technology, Taiyuan 030024, China
国际会议
The 24th Chinese Control and Decision Conference (第24届中国控制与决策学术年会 2012 CCDC)
太原
英文
2282-2286
2012-05-23（万方平台首次上网日期，不代表论文的发表时间）