Modal parameters identification of elastic drive systems using the wavelet transform

Wavelet theory has become a powerful mathematical tool and an important signal processing means for its distinct utilities and its numerous advantages. This paper presents its usefulness on modal identification of a special class of electromechanical systems: the elastic drive systems. It is shown t...

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Bibliographic Details
Published in5th IET International Conference on Power Electronics, Machines and Drives (PEMD 2010) p. TU452
Main Authors Loussifi, H, Nouri, K, Dhaouadi, R
Format Conference Proceeding
LanguageEnglish
Published Stevenage, UK IET 2010
Subjects
Drives
Integral transforms
wavelet theory
electromechanical systems
wavelet transforms
elastic three mass-model systems
signal processing
wavelet transform
elastic two mass-model systems
identification
drives
Morlet wavelet
Shannon entropy
mathematical tool
information theory
elastic drive systems
modal parameters identification
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Summary:Wavelet theory has become a powerful mathematical tool and an important signal processing means for its distinct utilities and its numerous advantages. This paper presents its usefulness on modal identification of a special class of electromechanical systems: the elastic drive systems. It is shown that the Wavelet Transform (WT) of the impulse response of an elastic drive system allows the estimation of the natural frequencies and damping ratios. The method is based on the ridges and skeletons of the WT. The Shannon entropy has been used to optimize the chosen modified Morlet wavelet. The accuracy of the developed method is confirmed by applying it to an elastic Two Mass-Model (2MM) and Three Mass-Model (3MM) systems. The simulation results obtained check the efficiency of the developed identification method even in presence of noise. (6 pages)
ISBN:1849192316
9781849192316
DOI:10.1049/cp.2010.0157