A diagnostic method is introduced for helicopter gearboxes that uses knowledge of gearbox structure and characteristics of the features of vibration to define the influences of faults on features. To define the structural influences, the gearbox is represented by a lumped mass model and the root mean square value of vibration from this model is used to assign the influences. These structural influences are then converted to fuzzy variables to account for the approximate nature of the simplified gearbox model, and used as the connection weights of a connectionist network. Diagnosis in this Structure-Based Connectionist Network (SBCN) is performed by propagating the abnormal features obtained from an unsupervised pattern classifier through the connection weights of SBCN to obtain fault possibility values for each component in the gearbox. The performance of the SBCN is tested in application to an OH-58A helicopter gearbox. The results indicate a diagnostic accuracy rate of about 80 %, which is remarkable considering that the SBCN performed diagnosis in the absence of any supervised training.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Fuzzy connectionist network for fault diagnosis of helicopter gearboxes


    Additional title:

    Fuzzy-Schaltungsnetzwerk für die Fehlerdiagnose von Hubschraubergetriebegehäusen


    Contributors:
    Jammu, V.B. (author) / Danai, K. (author) / Lewicki, D.G. (author)


    Publication date :

    1995


    Size :

    11 Seiten, 6 Bilder, 5 Tabellen, 35 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Unsupervised Connectionist Network for Fault Diagnosis of Helicopter Gearboxes

    Jammu, V. / Danai, K. / Lewicki, D. et al. | British Library Conference Proceedings | 1997




    Efficient fault diagnosis of helicopter gearboxes

    Chin, H. / Danai, K. / Lewicki, D. G. | NTRS | 1993


    Improving the Performance of the Structure-based Connectionist Network for Diagnosis of Helicopter Gearboxes

    Jammu, V. B. / Danai, K. / Lewicki, D. G. et al. | British Library Conference Proceedings | 1996