Paper Title:
Detection Method of Gradual Fault Signal Based on Wavelet Transform in the Dynamic System
  Abstract

The non-stationary signal is classified into the abrupt singular signal and the gradual singular signal. Because the fault of closed-loop control system is difficult to detect the initial moment when the fault happened, and often there is a more serious consequences once the fault was detected. A new method is proposed which can predict whether the fault happened through the trend signal of a dynamic system. The trend signal was got by the wavelet transform of the detected signal. In order to verify the effectiveness of the method, the leak fault was installed in the process control water tank experiment system, and the signal of liquid level and flow was collected. The gradual leak fault was found through the trend signal in low frequency which was got by the wavelet multi-scale resolution, so the practicability of the proposed method was proved.

  Info
Periodical
Edited by
Ran Chen
Pages
3790-3794
DOI
10.4028/www.scientific.net/AMM.44-47.3790
Citation
H. L. Du, Z. F. Wang, F. Lv, W. X. Du, "Detection Method of Gradual Fault Signal Based on Wavelet Transform in the Dynamic System", Applied Mechanics and Materials, Vols. 44-47, pp. 3790-3794, 2011
Online since
December 2010
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