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A new algorithm to extract basic frequency of stayed-cable is put forward in this paper. The continue wavelet transform of modified Morlet wavelet is derived in detail. The basic frequency will be extracted out accurately for long time signal. The runtime of continue wavelet transform is reduced immensely if the small range of scale coefficients is used. With applying the algorithm into the actual...
Mode parameters extraction with Morlet wavelet continuous transformation is an important algorithm in fault diagnosis area. However, there is aliasing phenomenon between two modes on the scale image of wavelet continuous transformation while vibration modes are concentrated. A new wavelet function named mode wavelet is put forward in this paper. The mode wavelet continuous transformation can split...
The free response signal is the foundation of vibration signal analysis and recognition. But under the restrictions of engineering conditions, the number of sampling points is usually not large enough to meet the requirement of Random Decrement Technique (RDT). Thereby, the free response signal obtained contains relatively strong noise. Aiming at the shortcoming of the classical RDT, a multi-secant...
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