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Wavelet decomposition and radial basis function networks for system monitoring

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2 Author(s)
A. Ikonomopoulos ; Nucl. Cycle Dev. Inst., Fukui, Japan ; A. Endou

Two approaches are coupled to develop a novel collection of black box models for monitoring operational parameters in a complex system. The idea springs from the intention of obtaining multiple predictions for each system variable and fusing them before they are used to validate the actual measurement. The proposed architecture pairs the analytical abilities of the discrete wavelet decomposition with the computational power of radial basis function networks. Members of a wavelet family are constructed in a systematic way and chosen through a statistical selection criterion that optimizes the structure of the network. Network parameters are further optimized through a quasi-Newton algorithm. The methodology is demonstrated utilizing data obtained during two transients of the Monju fast breeder reactor. The models developed are benchmarked with respect to similar regressors based on Gaussian basis functions

Published in:

IEEE Transactions on Nuclear Science  (Volume:45 ,  Issue: 5 )