Many signal processing tools have been developed by the mechanical and signal processing community to find the characteristic symptoms of sharp bearing faults (like localized spalling) from vibratory analysis. However the context of helicopter imposes a limited sampling frequency regarding the observed phenomena, many noisy vibrations and flight regimes. The performances of the classical methods are limited in such an environment mainly in identifying fault frequencies. Local bearing faults induce temporal periodic and impulsive patterns that produce redundant harmonics in the spectral domain. In this article four methods are proposed to take advantage of that redundancy. These methods provide an estimator of the fault frequency and an indicator of the quality of that estimation. These indicators are used to assess the severity of the fault. The four methods are then tested on synthesized and flight data in order to illustrate and discuss their efficiency.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Vibration-based fault detection of sharp bearing faults in helicopters


    Contributors:


    Publication date :

    2012


    Size :

    6 Seiten, 7 Bilder, 13 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Early Fault Diagnosis of Bearing Faults Using Vibration Signals

    Liu, Yuwei / Cheng, Yuqiang / Zhang, Zhenzhen et al. | IEEE | 2021


    Vibration Rating of Medical Helicopters

    Tamer, Aykut / Muscarello, Vincenzo / Masarati, Pierangelo et al. | British Library Conference Proceedings | 2018


    Detection and Prognosis of Propagating Faults in Flight Control Actuators for Helicopters

    Nesci, Andrea / De Martin, Andrea / Jacazio, Giovanni et al. | BASE | 2020

    Free access

    Vibration isolation systems for compound helicopters

    STAMPS FRANK BRADLEY / SMITH MICHAEL REAUGH / PASSE BRADLEY JOSEPH | European Patent Office | 2024

    Free access

    Vibration isolation systems for compound helicopters

    STAMPS FRANK BRADLEY / SMITH MICHAEL REAUGH / PASSE BRADLEY JOSEPH | European Patent Office | 2025

    Free access