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• W3118339410 endingPage "107585" @default.
• W3118339410 startingPage "107585" @default.
• W3118339410 abstract "Rotating machinery signals are usually dominated by rotating frequency harmonics, and the presence of these frequency components or change in their magnitudes indicate health condition. Order spectrum is widely applied in rotating machinery fault feature extraction, because of its capability in intuitive spectral representation of rotating frequency harmonics in order domain. However, some speed non-synchronous components are often present. They show wide-band features in order spectra, and hinder accurate identification of rotating frequency harmonic orders. To address this issue, a scheme is proposed to identify and remove speed non-synchronous components of either constant or time-varying frequency. To this end, surrogate test is generalized through new candidate construction method and nonstationarity based indicator for test criterion, to identify true nonstationary signal components adaptively and eliminate subjective influences. Vold-Kalman filter is used to separate signal components by exploiting its capability in mono-component decomposition of complex nonstationary signals. The proposed method is validated through analyses of both induction motor stator current signals and hydraulic turbine rotor vibration signal. The results demonstrate its advantages over conventional computed order spectrum analysis." @default.
• W3118339410 created "2021-01-18" @default.
• W3118339410 creator A5016072599 @default.
• W3118339410 creator A5025855932 @default.
• W3118339410 date "2021-06-01" @default.
• W3118339410 modified "2023-09-25" @default.
• W3118339410 title "Order spectrum analysis enhanced by surrogate test and Vold-Kalman filtering for rotating machinery fault diagnosis under time-varying speed conditions" @default.
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• W3118339410 doi "https://doi.org/10.1016/j.ymssp.2020.107585" @default.
• W3118339410 hasPublicationYear "2021" @default.
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