Identification of bridge modal parameters from GNSS data by integrating IEWT and robust ICA algorithm
Jiayong Yu,
Yilun Xie,
Zhen Fang
et al.
Abstract:Empirical Wavelet Transform (EWT) is often used to process GNSS bridge deformation monitoring data, but it leads to inaccurate band division and too many spurious modes. To address these problems, this study proposes an improved algorithm to identify bridge modal parameters, which combines improved EWT (IEWT) and Robust ICA. The proposed method adopts the autoregressive power spectrum of an improved covariance algorithm, instead of the Fourier spectrum, for band division. Additionally, it performs noise reduct… Show more
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