DocumentCode :
2430283
Title :
Anomaly detection for equipment condition via cross-correlation approximate entropy
Author :
WANG, Tianyang ; CHENG, Weidong ; LI, Jianyong ; WEN, Weigang ; WANG, Heng
Author_Institution :
Sch. of Mech. & Electron. Control Eng., Beijing Jiaotong Univ., Beijing, China
fYear :
2011
fDate :
8-11 Jan. 2011
Firstpage :
52
Lastpage :
55
Abstract :
In this paper, a new method named cross-correlation approximate entropy is proposed based on the correlation analysis and the approximate entropy theory. It can detect anomaly of running state in a quantitative manner without any priori knowledge. The method takes a section of signal with fixed-length of running state of equipment as a window. By sliding the window through the state signal, the paper calculates the cross-correlation function of the first window and latter ones, and then figure out their approximate entropy values. This paper sets the approximate entropy value of cross-correlation function of the first and second windows as the standard value. If there is an anomaly, the approximate entropy value of cross-correlation function of windows will be far larger than the standard value. Finally, a case is studied to test the validity and stability of this method by using the normal vibration signals of normal and faulty rolling bearing.
Keywords :
condition monitoring; entropy; fault diagnosis; machinery; rolling bearings; anomaly detection; condition monitoring; cross-correlation approximate entropy; equipment condition; faulty rolling bearing; mechanical equipment; vibration signals; Condition monitoring; Correlation; Entropy; Monitoring; Stability analysis; Velocity control; Vibrations; anomaly detection; condition monitoring; cross-correlation approximate entropy;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Management Science and Industrial Engineering (MSIE), 2011 International Conference on
Conference_Location :
Harbin
Print_ISBN :
978-1-4244-8383-9
Type :
conf
DOI :
10.1109/MSIE.2011.5707455
Filename :
5707455
Link To Document :
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