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- W4367663407 abstract "In this article, a Bayesian filtering approach to adaptively extracting the crossed time-frequency (TF) ridges of ultrasonic guided waves (GWs) and retrieving their overlapped modes is proposed. Based on the generalized non-parametric GW signal model, the phase evolution of each overlapped mode can be described by the state transition equation developed by a polynomial prediction model (PPM). When an analyzed GW in the frequency domain is viewed as the measurement equation of the states, a state space model in the frequency domain for describing the GW and its modes is established. As a result, a Bayesian filtering approach can be used to extract the crossed TF ridges and separate the overlapped modes in an analyzed GW when the mode number in the signal is known as a priori. When such a priori is unavailable, an adaptive detection method of the mode number in a GW is acquired by a non-parametric iterative adaptive estimation scheme. In this way, the proposed method can be applied to cases where an analyzed GW with unknown modes can also be extracted and separated accurately. Simulation results show that the proposed method can correctly extract the crossed TF ridges and separate the overlapped modes when the signal-to-noise ratio (SNR) is higher than −5 dB. In the steel plate experiment, the correlation coefficients of <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>${S}_{{0}}$ </tex-math></inline-formula> , <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>${A}_{{0}}$ </tex-math></inline-formula> , and <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>${A}_{{1}}$ </tex-math></inline-formula> modes between the original and retrieved signals are 0.900, 0.772, and 0.915, respectively, which are over the reported results in the literature." @default.
- W4367663407 created "2023-05-03" @default.
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- W4367663407 date "2023-07-01" @default.
- W4367663407 modified "2023-10-16" @default.
- W4367663407 title "A Bayesian Filtering Approach to Multimode Separation and Retrieval of Ultrasonic Guided Waves" @default.
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- W4367663407 doi "https://doi.org/10.1109/tuffc.2023.3271638" @default.
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