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To address the issue that traditional spectral amplitude modulation methods are susceptible to noise, this paper proposes a parameterized S spectral amplitude modulation method, where a parameterized S-transform is applied to obtain the amplitude of a signal in the time-frequency domain. First, the parameterized S-transform is used to convert the signal into the time-frequency domain and obtain its amplitude and phase information. Then, different weights are assigned to the amplitude in the time-frequency domain to alter the contribution of different energy frequency components in the signal. Lastly, the modulated amplitude is combined with the original phase, and the parameterized inverse S-transform is used to reconstruct a series of modified signals for computing squared envelope spectra and extracting fault characteristics. The simulation and experimental results indicate that the amplitude information obtained using the proposed method is more accurate and comprehensive compared to traditional spectral amplitude modulation methods. This method exhibits greater robustness in high-noise environments, and can effectively diagnose faults in the outer and inner rings of rolling bearings and compound faults. The proposed method is compared with traditional spectral amplitude modulation methods and fast Kurtogram. The results demonstrate that the parameterized S spectral amplitude modulation can not only detect bearing fault information in high-noise environments, but also extract multiple fault components simultaneously. Therefore, it exhibits obvious advantages in the diagnosis of rolling bearing faults. © 2024 Xi'an Jiaotong University. All rights reserved.
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Journal of Xi'an Jiaotong University
ISSN: 0253-987X
Year: 2024
Issue: 3
Volume: 58
Page: 117-128
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WoS CC Cited Count: 0
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ESI Highly Cited Papers on the List: 0 Unfold All
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30 Days PV: 5
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