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    Volume 35, Issue 5 (April 2007)

    Gearbox Fault Feature Extraction Using Hilbert Transform, S-Transform, and a Statistical Indicator

    (Received 11 August 2006; accepted 6 February 2007)

    Published Online: 30 April 2007

    CODEN: JTEVAB

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    Abstract

    Vibration analysis has been widely used in machine fault feature extraction and diagnosis of rotating machinery. The effects of modulation and nonstationarity in vibration signals collected from a faulty gearbox present challenges for fault feature extraction. Hilbert transform and S-transform have the ability to address these issues through demodulation and time-frequency analysis, respectively. In this paper, we propose to use a feature indicator to represent the S-transform coefficients. The proposed method integrates the advantages of Hilbert transform, S-transform, and the proposed feature indicator (FI). The validity of the proposed method is verified with a simulated signal and real gearbox vibration signals. Comparison studies show that the proposed method is more effective and does not require the operators to have a lot of diagnostic experience.

    Author Information:

    Fan, Xianfeng
    State Key Laboratory of Mechanical System and Vibration, Shanghai Jiaotong University, Shanghai

    Zuo, Ming J.
    Department of Mechanical Engineering, University of Alberta, Edmonton, Alberta


    Stock #: JTE100758

    ISSN:0090-3973

    DOI: 10.1520/JTE100758

    Author
    Title Gearbox Fault Feature Extraction Using Hilbert Transform, S-Transform, and a Statistical Indicator
    Symposium ,
    Committee E28