¹Hunan Provincial Key Laboratory of Health Maintenance for Mechanical Equipment, Hunan University of Science and Technology, Xiantan, 411201, China
²Engineering Research Center of Advanced Mine Equipment, Ministry of Education, Hunan University of Science and Technology, Xiangtan 411201, China

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Abstract—On the rotor comprehensive fault simulation testbed, characteristics of acoustic emission signal of different crack rotors in various depth and conditions are analyzed by the acoustic emission extraction experiment. The noiseeliminating method of the acoustic emission signal was researched by the wavelet packet technique, the characteristics of acoustic emission signal of the rotor crack was also obtained for fault diagnosis in this paper. The advantages of acoustic emission technique have been highlighted in the early period crack fault diagnosis compared to the vibration method of crack fault diagnosis. The diagnosis results were shown to be quite clear, reliable and accurate.

Index Terms—Rotor crack, acoustic emission, wavelet packet, fault diagnosis.

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Cite: Kuanfang He, Jigang Wu, Guangbin Wang, "Acoustic Emission Signal Feature Extraction in Rotor Crack Fault Diagnosis," Journal of Computers vol. 7, no. 9, pp. 2120-2127, 2012.