|
|||||
|
|
Fault Diagnosis of a Rotor Based on a Lifting Wavelet and Local Wave |
|
| Authors: | WANG Feng-li GAO Hong-tao ZHAO De-you School of Ship Engineering Dalian University of Technology Dalian ChinaCollege of Marine Engineering Dalian Maritime University Dalian China |
| Affiliation: | WANG Feng-li1,2,GAO Hong-tao 2,ZHAO De-you11 School of Ship Engineering,Dalian University of Technology,Dalian 116024,China2College of Marine Engineering,Dalian Maritime University,Dalian 116026,China |
| Abstract: | Aiming at the mode mixture in local wave decomposition(LWD) caused by a noise signal, the original data is preprocessed using the lifting wavelet transformation to suppress abnormal interference of noise and improve the quality of decomposition. It is employed to analyze the vibration signal of rotor rub-impact for extracting the weak impulsive feature. The signal is decomposed into intrinsic mode functions by LWD, then the high-frequency components are analyzed by Hilbert envelop demodulation. The period o... |
| Keywords: | local wave lifting scheme fault diagnosis envelope demodulation rub-impact |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |