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In the last decades, vibration-based condition monitoring of rotating machine has gained special interest providing an efficient aid for maintenance in the industry. Vibration-based condition monitoring of rotating machines in nonstationary regime.
INSA de Lyon, Unfortunately, most monitored machines used in the industry operate under nonstationary regimes in order to fulfill the task for which they have been designed. The first type includes deterministic waveforms known as first-order cyclostationary.
This service is produced by Kompass. The second type includes random periodically-correlated waveforms known as second-order cyclostationary. Register Forgot your password?
However, all these techniques rely on the assump-tion of constant— or possibly fluctuating but stationary— operating regime i. You might also like: Friday, September 23, – 4: Click on toutnante of the icons to share the company. The proposed solution consists in generalizing the first-order cyclostationary class to the more general first-order cyclo-non-stationary class which enfolds speed-varying deterministic signals.
Three different but complementary visions have been proposed to deal with the changes induced by the nonstationarity of the operating speed. You might also like. Have you forgotten your login? Help with expert advice. Other classifications for some countries NAF Rev. Create your web page Haltools: In this case, these techniques fail in analyzing the produced vibration signals.
Analyse de vibration
All the lines are busy at the moment, please try again in a moment. Dany Abboud 1 Details. Description Key figures Executives Activities. Information available as an option. In this work, the nonstationarity of the regime is confined to that of the speed— i.
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Business tools and solutions designed for the global marketplace. We have elaborated this strategy by distinguishing two types of signatures. This issue, therefore, has occupied the scientific committee in the last decade and some sophisticated signal processing techniques have been conceived to deal with regime variability.
Share this company profile. Nowadays, many efficient techniques are well-established, rooted on powerful tools offered in particular by the theory of cyclostationary processes. But these works remain limited, dispersed and generally not supported by theoretical frameworks.
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The principal goal of this thesis is to partially fill in this gap on the basis of a theoretical formalization of the subject and a systematic development of new dedicated signal processing tools. Many tools have been conceived whose performances have been successfully tested on simulated and real vibration signals.
In order to reach this goal, the adopted methodology consists in extending the cyclostationary framework together with its dedicated tools.