A Revised Hilbert–Huang Transform and Its Application to Fault Diagnosis in a Rotor System
As a classical method to deal with nonlinear and nonstationary signals, the Hilbert–Huang transform (HHT) is widely used in various fields. In order to overcome the drawbacks of the Hilbert–Huang transform (such as end effects and mode mixing) during the process of empirical mode decomposition (EMD)...
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MDPI AG
2018-12-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/18/12/4329 |
| _version_ | 1828119306670440448 |
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| author | Hongjun Wang Yongjian Ji |
| author_facet | Hongjun Wang Yongjian Ji |
| author_sort | Hongjun Wang |
| collection | DOAJ |
| description | As a classical method to deal with nonlinear and nonstationary signals, the Hilbert–Huang transform (HHT) is widely used in various fields. In order to overcome the drawbacks of the Hilbert–Huang transform (such as end effects and mode mixing) during the process of empirical mode decomposition (EMD), a revised Hilbert–Huang transform is proposed in this article. A method called local linear extrapolation is introduced to suppress end effects, and the combination of adding a high-frequency sinusoidal signal to, and embedding a decorrelation operator in, the process of EMD is introduced to eliminate mode mixing. In addition, the correlation coefficients between the analyzed signal and the intrinsic mode functions (IMFs) are introduced to eliminate the undesired IMFs. Simulation results show that the improved HHT can effectively suppress end effects and mode mixing. To verify the effectiveness of the new HHT method with respect to fault diagnosis, the revised HHT is applied to analyze the vibration displacement signals in a rotor system collected under normal, rubbing, and misalignment conditions. The simulation and experimental results indicate that the revised HHT method is more reliable than the original with respect to fault diagnosis in a rotor system. |
| first_indexed | 2024-04-11T13:45:28Z |
| format | Article |
| id | doaj.art-6ac8dfc2b4334d59ba3952896ec26f0f |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T13:45:28Z |
| publishDate | 2018-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-6ac8dfc2b4334d59ba3952896ec26f0f2022-12-22T04:21:06ZengMDPI AGSensors1424-82202018-12-011812432910.3390/s18124329s18124329A Revised Hilbert–Huang Transform and Its Application to Fault Diagnosis in a Rotor SystemHongjun Wang0Yongjian Ji1School of Mechanical and Electrical Engineering, Beijing Information Science & Technology University, Haidian, Qinghe Xiaoying Donglu No. 12, Beijing 100192, ChinaSchool of Mechanical and Electrical Engineering, Beijing Information Science & Technology University, Haidian, Qinghe Xiaoying Donglu No. 12, Beijing 100192, ChinaAs a classical method to deal with nonlinear and nonstationary signals, the Hilbert–Huang transform (HHT) is widely used in various fields. In order to overcome the drawbacks of the Hilbert–Huang transform (such as end effects and mode mixing) during the process of empirical mode decomposition (EMD), a revised Hilbert–Huang transform is proposed in this article. A method called local linear extrapolation is introduced to suppress end effects, and the combination of adding a high-frequency sinusoidal signal to, and embedding a decorrelation operator in, the process of EMD is introduced to eliminate mode mixing. In addition, the correlation coefficients between the analyzed signal and the intrinsic mode functions (IMFs) are introduced to eliminate the undesired IMFs. Simulation results show that the improved HHT can effectively suppress end effects and mode mixing. To verify the effectiveness of the new HHT method with respect to fault diagnosis, the revised HHT is applied to analyze the vibration displacement signals in a rotor system collected under normal, rubbing, and misalignment conditions. The simulation and experimental results indicate that the revised HHT method is more reliable than the original with respect to fault diagnosis in a rotor system.https://www.mdpi.com/1424-8220/18/12/4329Hilbert–Huang transformempirical mode decompositionend effectsmode mixingrotor systemfault diagnosis |
| spellingShingle | Hongjun Wang Yongjian Ji A Revised Hilbert–Huang Transform and Its Application to Fault Diagnosis in a Rotor System Sensors Hilbert–Huang transform empirical mode decomposition end effects mode mixing rotor system fault diagnosis |
| title | A Revised Hilbert–Huang Transform and Its Application to Fault Diagnosis in a Rotor System |
| title_full | A Revised Hilbert–Huang Transform and Its Application to Fault Diagnosis in a Rotor System |
| title_fullStr | A Revised Hilbert–Huang Transform and Its Application to Fault Diagnosis in a Rotor System |
| title_full_unstemmed | A Revised Hilbert–Huang Transform and Its Application to Fault Diagnosis in a Rotor System |
| title_short | A Revised Hilbert–Huang Transform and Its Application to Fault Diagnosis in a Rotor System |
| title_sort | revised hilbert huang transform and its application to fault diagnosis in a rotor system |
| topic | Hilbert–Huang transform empirical mode decomposition end effects mode mixing rotor system fault diagnosis |
| url | https://www.mdpi.com/1424-8220/18/12/4329 |
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