Fault diagnosis for multistage dynamic processes based on signed directed graph

作者：Zhou Hong^*; Zuo Hong Fu; Su Yan; Bai Fang

来源：Journal of Aerospace Power, 2012, 27(11): 2539-2546.

• Consistent branch
• Diagnosis methods
• Dynamic characteristics
• Dynamic process
• Fault diagnosis model
• Multistage process
• Signed directed graph
• Unmeasured nodes

After analyzing the dynamic characteristics of multistage processes, new qualitative description model-process dynamic signed directed graph (PDSDG) was proposed by introducing the stage conditions to unmeasured nodes in SDG. The modeling method and a D matrix-based diagnosis method were given. The proposed model can meet the demand of adjustment along with the conditions, and the diagnosis method disposed the nodes that were not online observed. PDSDG had better resolution than static SDG by comprehensive consideration of different stage diagnosis results. Finally, the fault diagnosis model of an aircraft engine bleed system was built with the proposed method. The case results proved the effectivity and utility of this model.

• 出版日期2012
• 单位南京航空航天大学