Diagnosis of Mechanical System Failures Based on the Application of Cyclostationarity.

Autor: Babouri, Mohamed Khemissi, Kebabsa, Tarek, Ouelaa, Nouredine
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Zdroj: Journal of Vibration Engineering & Technologies; Mar2024, Vol. 12 Issue 3, p5133-5146, 14p
Abstrakt: Purpose: The implementation of conditional and preventive maintenance of rotating machines based on accurate vibration monitoring appears to be a suitable solution for the early detection of mechanical defects, something which is unfortunately not always obvious. Methods: In this study, we propose an advanced and recent method for processing no stationary and nonlinear signals in an industrial environment, based on cyclostationary analysis. The proposed technique is initially used to signals measured on defective bearings on a test bench. Finally, the industrial application realized on a valid production machine for large-scale, beyond that of the laboratory. The main objective of this work is to respond to the demand of a large FERTIAL industrial group where vibration analysis has been used to analyze the signal vibration measured on the journal bearings of a reducer GVAB420 of a turbo alternator GZ1164. Results: The problem encountered in this case is due to the reduction in the generation of the electrical load from six to five MVA, resulting in a sharp rise in the vibration level on all frequency bands of the turbine and machine bearings. To remedy this problem, a vibration analysis has been used for analyzing measured signals on this turbo-alternator which operates in true conditions. The results obtained proved the ability of the proposed approach to highlight the exact nature of the mechanical fault studied and its gravity in various setups, whatever the type of faults: on the outer and inner races; and journal bearings in an industrial environment. Conclusions: This significant contribution highlights the potential of advanced vibration analysis, using plots of its two indicators MID and IMID created with the proposed approach can be easily interpreted by maintenance engineers as a simple spectrum, for significantly improving the reliability and operational lifespan of critical machines, which is of utmost importance in various industries. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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