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Zhongdong Liu, Ralf Nötzel, Karl-Walter Bonfig

Sampling of Narrow Band Signals and its Application for Envelope Analysis in Computer-aided Diagnosis Systems

Keywords: sampling, narrow band signal, sampling theorem, envelope analysis, fault diagnosis

This paper presents a modified procedure for the application of the envelope analysis for fault detection and diagnosis in rolling bearings. It is shown that the sampling frequency for the sampling of narrow band signals can be considerably lower than sampling theorem demands as long as some conditions are met. Based on this technique a new signal processing procedure for the envelope detection is proposed and illustrated with numerical and practical examples.

tm – Technisches Messen, Oldenbourg Wissenschaftsverlag

Print ISSN: 0171-8096
Volume: 74, 02/2007
Pages: 063 - 073

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