A new multiwavelet is constructed according to the signal feature
which utilizes mulitiwavelet lifting
taking kurtosis as the optimal object and genetic algorithm as the optimal strategy. The new multiwavelet is substituted for the filter in spectral kurtosis(SK)and the kurtogram is improved accordingly. The multiwavelet spectral kurtosis is proposed based on the conventional SK
which makes up the SK in filter limitation and improves the resolution of spectral analysis. The examples for rolling bearing in test rig and locomotive result indicate the improved accuracy of frequency-band-selection and the signal-to-noise-ratio of signal filtered.
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references
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