Fault Diagnosis of Aircraft Power Supply Based on Priority Dynamic Fault Tree

Abstract:

In this paper, we propose a novel fault diagnosis method for aircraft power supply system. We constructed the Dynamic Fault Tree (DFT) of the Constant Speed Constant Frequency Alternation Current (CSCF-AC) power supply system based on the Priority Dynamic Fault Tree (PDFT). And by adding a new temporal operator BEFORE (BF) to the usual Boolean operators, we derived the structure function of the top event. Then two laws were provided to reduce this structure function to a sum-of-product canonical form, where each product term defined a minimal cut set (MCS) or a minimal cut sequence set (MCSS) of this fault tree. This approach provides a complete qualitative description of the system without resorting to the corresponding Markov model. Then a 3-layer network diagnosis system was designed and realized for the fault diagnosis of aircraft power supply, including onboard layer, ground maintenance layer and remote expert layer. This 3-layer system enhances the flow of complex fault data into higher expert layer to realize the advanced diagnosis.

• Periodical: Advanced Materials Research (Volumes 443-444)
• Pages: 229-236
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.443-444.229
• Online since: January 2012
• Authors: Zheng Ting Huang, Zhong Sheng Wang, Zhen Bao Liu
• Keywords: 3-Layer Network Diagnosis System, Aircraft Power Supply, Fault Diagnosis, Priority Dynamic Fault Tree

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