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Hilbert transform-based frequency response function estimation from run-up response of rotors
Published in SAGE Publications Ltd
2018
Volume: 232
   
Issue: 12
Pages: 2200 - 2210
Abstract
Transient operating conditions such as run-up and run-down are often seen in automotive and other machines with variable speed rotating elements. To estimate the frequency response function from swept sine responses (obtained during run-up), a new approach is proposed which utilizes Hilbert transform and stationary wavelet transform. This method is an alternate tool for conventional swept sine frequency response function estimators like tracking vectors and co-quad analysers. The output from this algorithm is validated using frequency response function obtained using exact frequency response function expression and the conventional Fourier transform-based frequency response function. Both MATLAB simulations and experiments have been carried out in this study to estimate the frequency response function. Modal parameters are extracted from the frequency response function obtained using Hilbert transform. © 2017, IMechE 2017.
About the journal
JournalData powered by TypesetProceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science
PublisherData powered by TypesetSAGE Publications Ltd
ISSN09544062
Open AccessNo
Concepts (13)
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    Frequency estimation
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    MATLAB
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    Modal analysis
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    Wavelet transforms
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    EXACT FREQUENCIES
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    FREQUENCY RESPONSE FUNCTION ESTIMATORS
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    Frequency response functions
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    Hilbert transform
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    Matlab simulations
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    RUN UP AND RUN DOWNS
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    STATIONARY WAVELET TRANSFORMS
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    Transient operating condition
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    Frequency response