Maximization of the signal impulsiveness combining envelope technique with minimum entropy deconvolution

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de Oliveira, Rafael José Gomes [UNESP]
Mathias, Mauro Hugo [UNESP]

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The application of the HFRT (High-Frequency Resonance Technique), a demodulation based technique, is a technique for evaluation the condition of bearings and other components in rotating machinery. Another technique MED (Minimum Entropy Deconvolution) has been the subject of recent developments for application in condition monitoring of gear trains and roller bearings. This article demonstrates the effectiveness of the combined application of the MED technique with HFRT in order to enhance the capacity of HFRT to identify the characteristic fault frequencies of damaged bearings by increasing the signal impulsivity. All tests were done using data collected from an experimental test bench in laboratory. The Kurtosis value is used as an indicator of effectiveness of the combined technique and the results shown an increase of five times the original kurtosis value with the application of MED filter together with the HFRT. © (2013) Trans Tech Publications, Switzerland.



Demodulation, Fault identification, HFRT

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Applied Mechanics and Materials, v. 392, p. 725-729.