Application of First-order linear system’s Stochastic ResonanceIn Fault Diagnosis of Rotor Shaft

Leng Yong-gang;Tian Xiang-you

Journal of Vibration and Shock ›› 2014, Vol. 33 ›› Issue (17) : 1-5.

PDF(1724 KB)
PDF(1724 KB)
Journal of Vibration and Shock ›› 2014, Vol. 33 ›› Issue (17) : 1-5.
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Application of First-order linear system’s Stochastic ResonanceIn Fault Diagnosis of Rotor Shaft

  • Leng Yong-gang1,2, Tian Xiang-you1
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Abstract

The extraction method of a signal’s frequency based on the parameter- adjusted stochastic resonance (SR) of first-order linear system in a broad sense is presented in this paper, which is aimed at recognizing the weak fault signal in early stage. This method makes use of the phenomenon that the output signal-to-noise ratio (SNR) will get a resonance peak by tuning the system’s parameter. To make characteristic signal more distinct, the paper explains how to choose the parameters among the system parameter, signal frequency and sampling rate targeted at the best signal recognition. Then the simulated rotor shaft’s early weak fault from test-bed of sliding bearing confirms the effectiveness of this method.

Key words

first-order linear system / parameter-adjusted SR in a broad sense / weak signal / fault diagnosis

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Leng Yong-gang;Tian Xiang-you. Application of First-order linear system’s Stochastic ResonanceIn Fault Diagnosis of Rotor Shaft[J]. Journal of Vibration and Shock, 2014, 33(17): 1-5
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