期刊
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
卷 25, 期 4, 页码 1276-1286出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ymssp.2010.10.008
关键词
Modified morphological analysis; Length of the structure element; Fault diagnosis; Rolling element bearing
资金
- National Natural Science Foundation of China [50275113]
In order to effectively smooth noise and extract the impulse components in the vibration signals of defective rolling element bearings, a new modified morphology analytical method has been proposed. In this method, average of the closing and opening operator has been used as the morphology operator. Being the flat and zero adopted as the shape and the height of structure element (SE), respectively, the optimized length of SE is defined by a new proposed criterion (called SNR criterion). The effect of the new method is validated by both simulated impulsive signal and vibration signal of three defective rolling bearings with an outer, an inner and a rolling element faults and compared with Nikolaou's method. The result shows that the proposed method has the superior performance in extracting impulsive characteristics of vibration signals, especially for the high level noise signals, and can implement better in diagnosis of defective rolling element bearing. (C) 2010 Elsevier Ltd. All rights reserved.
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