similarity diagnosis
1.Combining grey-relational theory and Euclidean distance, a new method for computing degree of similarity in case-based reasoning (CBR) was presented. And the systematic approach of intelligent fault diagnosis based on CBR was put forward, which included representation, search and updates of the cases.
2.The paper researched the key technologies of CBR method in the civil aircraft fault diagnosis: Applying the gray theory to the case similarity computation, and the difference derived method to case adaption.
3.1. Fractal Brownian Motion(FBM) was made from Gauss Noise and compared with pressure fluctuation signal of gas-solid fluidization,which demonstrated the similarity between the FBM and the signal. Then,Hurst Exponent was calculated from time series of the signal with R/S method. The exponent was applied in research of the identification and the diagnosis.
