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Indicators of cyclostationarity: proposal, statistical evaluation and application to diagnostics
2003 IEEE International Conference on Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03).
Year: 2003 | Conference Paper |
Cited by: Papers (5)
The paper proposes new and simple indicators of cyclostationarity for the characterization of stochastic processes whose statistics are periodically varying with respect to some generic variables. Indicators of cyclostationarity from first to fourth order are introduced and their statistical properties are derived. In order to illustrate the use of these indicators, an application to the diagnosis...Show More
Third-order cyclic characterization of vibration signals in rotating machinery
2002 11th European Signal Processing Conference
Year: 2002 | Conference Paper |
This paper introduces the application of third order cyclic statistics for vibration signals in rotating machinery. It is shown for the first time that these vibration signals display third-order cyclostationarity under some conditions. A model of signals modulated in amplitude and phase is used in order to compute the cyclic bispectrum, a third-order cyclic statistical parameter, in the frequency...Show More
Blind identification of ARMA systems using the discrete Random Decrement
2002 11th European Signal Processing Conference
Year: 2002 | Conference Paper |
The Random Decrement method is a computationally simple technique which was initially proposed in the control engineering field for the recovery of impulse responses of systems under operation. This paper demonstrates the advantage of formalising this exotic technique in the context of digital signal processing, thus bringing it to the fore of modern blind identification methods. The discrete Rand...Show More
Helicopter gearbox vibrations: cyclostationary analysis or bilinear approach?
Proceedings of the Sixth International Symposium on Signal Processing and its Applications (Cat.No.01EX467)
Year: 2001 | Conference Paper |
Cited by: Papers (5)
We show that a nonstationary approach can be preferred to a nonlinear one for the study of some nonlinear phenomena. We prove that the spectral correlation could detect and determine precisely a nonlinear phenomenon. Moreover, in terms of diagnosis on helicopter gearboxes (known for their strong nonlinearity), this tool is much more efficient than the bispectrum. Finally, we introduce an algorithm...Show More
Detection of broken rotor bar of induction motors by spectral analysis of the electromagnetic torque using the Luenberger observer
IECON'01. 27th Annual Conference of the IEEE Industrial Electronics Society (Cat. No.37243)
Year: 2001 | Conference Paper |
Cited by: Papers (10)
Rotor asymmetries lead to perturbations of airgap flux patterns in induction machines. These perturbations in flux components affect the electromagnetic torque, as well as stator currents and voltages. The supervision of these signals enables the detection of underlying mechanical asymmetries. The effect of mechanical imperfections on stator signals can be negligible in certain cases. Thus, this m...Show More
Comparison of the cyclostationary and the bilinear approaches: theoretical aspects and applications to industrial signals
Proceedings of the Tenth IEEE Workshop on Statistical Signal and Array Processing (Cat. No.00TH8496)
Year: 2000 | Conference Paper |
Cited by: Papers (2)
The aim of our study is to compare two a priori different approaches: bilinearity and cyclostationarity. Indeed, we underline that cyclostationary and bilinear tools make it possible to determine both nonlinear and nonstationary links. These results are based on calculations, simulations for synthetic signals and finally applications to industrial signals. Then, we introduce different applications...Show More
A multimedia tool for "signal processing for acoustic and vibration diagnosis of rotating machines"
M. Sidahmed;P. Morizet;P. Trigano;J.K. Hammond;S. Braun;G. Dalpiaz;U. Meneghetti;A. Maggiore
Proceedings IEEE International Conference on Multimedia Computing and Systems
Year: 1999 | Conference Paper |
We present the preliminary results of a project developed in the scope of the EC Leonardo da Vinci program. The objective of this project is to develop a CD-ROM for education and training in the domain of signal processing for the acoustic and vibration diagnosis of rotating machines. The project will cover basic methods of signal processing which apply in the relevant domain. The CD-ROM is organi...Show More
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