Optimal Detection of New Classes of Faults by an Invasive Weed Optimization Method

R. Razavi-Far, Vasile Palade, E. Zio

    Research output: Chapter in Book/Report/Conference proceedingChapter

    21 Citations (Scopus)


    Proper detection of unknown patterns plays an important role in diagnosing new classes of faults. This can be done by incremental learning of novel information and updating the diagnostic system by appending newly trained fault classifiers in an ensemble design. We consider a new-class fault detector previously developed by the authors and based on thresholding the normalized weighted average of the outputs (NWAO) of the base classifiers in a multi-classifier diagnostic system. A proper tuning of the thresholds in the NWAO detector is necessary to achieve a satisfactory performance. This is done in this paper by specifically introducing a performance function and optimizing it within the necessary trade-off between new class false alarm and new class missed alarm rates, by means of an Invasive Weed Optimization (IWO) algorithm. The optimal NWAO detector is tested with respect to a set of simulated sensor faults in the doubly-fed induction generator (DFIG) of a wind turbine.
    Original languageEnglish
    Title of host publicationInternational Joint Conference on Neural Networks, IJCNN 2014
    VolumeArticle number 6889887
    ISBN (Print)978-147991484-5
    Publication statusPublished - 3 Sept 2014

    Bibliographical note

    This conference paper is not yet available on the repository. The paper was given at the International Joint Conference on Neural Networks, IJCNN 2014; Beijing; China; 6 July 2014 through 11 July 2014.


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