Vibration Fault Diagnostics for Quality Control and Component Reuse: Diagnostics of Electric Motors and Household Appliances using Laser Doppler Vibrometer - Couverture souple

Vass, Jiri; B. Randall, Robert; Smid, Radislav

 
9783843359115: Vibration Fault Diagnostics for Quality Control and Component Reuse: Diagnostics of Electric Motors and Household Appliances using Laser Doppler Vibrometer
Couverture souple
ISBN 10 : 3843359113 ISBN 13 : 9783843359115
Editeur : LAP LAMBERT Academic Publishing, 2010

Synopsis

Quality control of household appliances can be improved by replacing human inspection with automated analysis of vibration signals. This book presents vibration methods for diagnosing and prognosing mechanical faults in electric motors and washing machines. This includes pre-processing of raw vibration data for reducing measurement noise, such as speckle noise occurring when optically rough surfaces are measured by Laser Doppler Vibrometer (LDV). New algorithms for speckle noise reduction are presented, including kurtosis ratio and optical level thresholding. Application to real LDV data (measured on production line by AEA srl, Loccioni) shows that these algorithms improve detectability of mechanical faults by enhancing envelope and order spectra. The book gives practical examples how to successfully combine classical methods (cepstrum, CPB spectrum, order tracking), as well as recent algorithms based on wavelet transform. The book presents findings of accelerated lifetime tests suggesting that motors and gearboxes possess a great potential for reuse. Proposed methods can be integrated into remaining life estimation methodologies.

Les informations fournies dans la section « Synopsis » peuvent faire référence à une autre édition de ce titre.

Présentation de l'éditeur

Quality control of household appliances can be improved by replacing human inspection with automated analysis of vibration signals. This book presents vibration methods for diagnosing and prognosing mechanical faults in electric motors and washing machines. This includes pre-processing of raw vibration data for reducing measurement noise, such as speckle noise occurring when optically rough surfaces are measured by Laser Doppler Vibrometer (LDV). New algorithms for speckle noise reduction are presented, including kurtosis ratio and optical level thresholding. Application to real LDV data (measured on production line by AEA srl, Loccioni) shows that these algorithms improve detectability of mechanical faults by enhancing envelope and order spectra. The book gives practical examples how to successfully combine classical methods (cepstrum, CPB spectrum, order tracking), as well as recent algorithms based on wavelet transform. The book presents findings of accelerated lifetime tests suggesting that motors and gearboxes possess a great potential for reuse. Proposed methods can be integrated into remaining life estimation methodologies.

Biographie de l'auteur

Jiri Vass is research engineer at Honeywell ACS Labs. PhD in Electrical Engineering Theory (Czech Technical University) awarded Siemens Excellence Award. Studied at Tampere University of Technology (Finland), Technion (Israel) and University of NSW (Australia). Author of 12 papers on fault diagnostics, vibration analysis and HVAC control.

Les informations fournies dans la section « A propos du livre » peuvent faire référence à une autre édition de ce titre.

Éditeur
LAP LAMBERT Academic Publishing
Date d'édition
2010
Langue
anglais
ISBN 10 
3843359113
ISBN 13 
9783843359115
Reliure
Broché
Nombre de pages
220
Coordonnées du fabricant
non disponible
Personne responsable
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