An improved filtering method based on EEMD and wavelet-threshold for modal parameter identification of hydraulic structure
We propose a noise index to estimate the noise degree of the components decomposed by EEMD. The ''noise index' is used to solve the noise standerd deviation determination problem in wavelet threshold calculation. The improved filtering method combined with ERA and SE provides an effective approach for the modal parameter indentification of hydraulic structure.
modal parameter identification wavelet threshold noise reduction ambient excitation white noise ensemble empirical mode decomposition