Dynamic Diagnosis of Elastic Coupling Transmissions of Technological Equipments Based on Joint Time-Frequency Evaluations

Abstract:

This work presents a practical solution intended for dynamic diagnosis of the technical systems based on a set of computational methods for processing and analyzing of the acquired signals. This ensemble of methods leads to the joint time-frequency evaluations and assures a multiple way to estimate the potential damages of certain parts of the tested system. Short-Time-Fourier-Transformation, Cepstrum analysis, power spectral density estimate, together with a group of stochastic estimators composes the structured procedure for dynamic diagnosis. The proposed approach of dynamic diagnosis combines the advantages of the time domain analysis, such as the simplicity and the possibility of parameters investigation during their time evolution, with the power of spectral complex evaluations, sustained by the distribution and shifting trend of spectrum. Hereby it has provided a suitable tool for characterization of spectral composition changes in time during the entire experimental tests. This information is able to reveal the dynamic behaviour changes of supervised parts, components or entire system.

• Periodical: Applied Mechanics and Materials (Volume 657)
• Pages: 465-469
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.657.465
• Online since: October 2014
• Authors: Silviu Năstac, Carmen Debeleac, Cristian Simionescu
• Keywords: Damage Detection, Dynamic Diagnosis, Elastic Coupling Transmission, Time-Frequency Analysis, Vibratory Technological Equipment

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