Abstract
A novel method of aero-engine rubbing positions identification based on cepstrum analysis is proposed, and the transfer path characteristics which reflect the transfer characteristics information from rubbing points to casing measuring points are separated from the vibration acceleration signals of casing by means of cepstrum analysis. Therefore, there is different transfer characteristics information at different rubbing positions, and in view of this, twenty rubbing positions identification features from the cepstrum are extracted. A large number of rubbing experiments of different positions are simulated with the rotor experiment rig of aero-engine, and the characteristic analysis of experimental samples at different rubbing positions is carried out, and the results indicate the consistency of features to the same rubbing position and the difference of the features to the different rubbing positions. Finally, the aero-engine rubbing positions identification is carried out using the nearest neighbor classification method, the recognition rate reaches 100%, and the effectiveness of the method is full verified.
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Recommended by Associate Editor Kyung-Soo Kim
Guo Chen received the Ph.D. from Southwest Jiaotong University, China, in 2000. He is currently a professor with the College of Civil Aviation, Nan**g University of Aeronautics and Astronautics, China. His research interests are mainly in whole aero-engine vibration, rotor dynamics, machine fault diagnosis.
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Chen, G., Liu, YQ., Jiang, GY. et al. A novel method for identifying rotor-stator rubbing positions using the cepstrum analysis technique. J Mech Sci Technol 28, 3537–3544 (2014). https://doi.org/10.1007/s12206-014-0814-y
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DOI: https://doi.org/10.1007/s12206-014-0814-y