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- W2997120470 abstract "Time-frequency analysis (TFA) technique is an effective method in the analysis of non-stationary signals with multiple signal components. Nevertheless, the current TFA methods such as short-time Fourier transform (STFT) and synchrosqueezing transform (SST) suffer from low signal resolution and diffused energy problems in the processing of multi-component signals. To resolve such shortcoming, a new signal analysis technique utilizing a combined variational mode decomposition (VMD) and synchrosqueezing transform (SST) is proposed in this study. VMD is used first to decompose the signal into several intrinsic mode functions (IMFs). Kurtosis values of the IMFs are calculated to determine the fault sensitive components to be used in the signal reconstruction. The noise reduced reconstructed signal is then analyzed using SST to produce a clearer and energy concentrated time-frequency representation (TFR) for an improved bearing fault diagnosis. The validity of the presented technique is verified utilizing a computer simulated signal and a bearing defect signal acquired from the experiment." @default.
- W2997120470 created "2020-01-10" @default.
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- W2997120470 date "2019-10-01" @default.
- W2997120470 modified "2023-10-11" @default.
- W2997120470 title "A time-frequency analysis of non-stationary signals using variation mode decomposition and synchrosqueezing techniques" @default.
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- W2997120470 doi "https://doi.org/10.1109/phm-qingdao46334.2019.8943036" @default.
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