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| SIGNAL SEPARATION TECHNOLOGY OF UNBALANCE-RUBBING-LOOSENESS COUPLING FAULTS OF DYNAMIC MODEL FOR ROTOR |
| QU Xiu-xiu; CHEN Guo;QIAO Bao-dong |
| College of Civil Aviation, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016，China |
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Abstract An unbalance-rubbing-looseness coupling faults dynamic model for rotor is established. In the model, bearings were reduced to a linear spring, and the rotor shaft was considered as equisection Euler free beam model. While, the differential equations of the system were established, using modal truncation method. Then the vibration response of this rotor system was obtained by a fast- numerical intergral method. Clearly, the system response must be a mixture of multiple fault signals. In this paper blind source separation was used to achieve the separation of rotor fault signal. And ZT-3 multi-function rotor test device was experimentally. Simulation and experimental results show the correctness of the dynamic model in this paper, and the effectiveness of blind source separation approach in implementing the coupling fault isolation
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Received: 25 March 2010
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Corresponding Authors:
QU Xiu-xiu
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2011, Vol. 30 
