Research on Fault Feature Extraction Method Based on NOFRFs and Its Application in Rotor Faults
Rub-impact between the rotating and static parts is a more common fault. The occurrence of faults is often accompanied by the generation of nonlinear phenomena. However, it is difficult to find out because the nonlinear characteristics are not obvious at the beginning of the fault. As a new frequenc...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2019-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2019/3524948 |
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| _version_ | 1832549216478560256 |
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| author | Yang Liu Yulai Zhao Jintao Li Fangquan Xi Shuanghe Yu Ye Zhang |
| author_facet | Yang Liu Yulai Zhao Jintao Li Fangquan Xi Shuanghe Yu Ye Zhang |
| author_sort | Yang Liu |
| collection | DOAJ |
| description | Rub-impact between the rotating and static parts is a more common fault. The occurrence of faults is often accompanied by the generation of nonlinear phenomena. However, it is difficult to find out because the nonlinear characteristics are not obvious at the beginning of the fault. As a new frequency domain-based method, nonlinear output frequency response functions (NOFRFs) use the vibration response to extract the nonlinear characteristics of the system. This method has a better recognition rate for fault detection. Also, it has been applied in structural damages detection, but the high-order NOFRFs have the characteristics that the signals are weak and the features are difficult to extract. On this basis, the concept of the weighted contribution rate of the NOFRFs is proposed in this paper. The variable weighted coefficients with orders are used to amplify the influence of high-order NOFRFs on the nonlinearity of the system so as to extract its fault characteristics. The new index RI is proposed based on Clenshaw–Curtis quadrature formula to eliminate the effect of artificially selected weighted coefficients on sensitivity. Especially in the early stage of the fault, the new index varies greatly with the deepening of the fault. Both simulation and experimental results verify the validity and practicability of the new index. The new index has certain guiding significance in the detection of mechanical system faults. |
| format | Article |
| id | doaj-art-17f70d22ebd84314a3c283f3773c263e |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-17f70d22ebd84314a3c283f3773c263e2025-02-03T06:11:54ZengWileyShock and Vibration1070-96221875-92032019-01-01201910.1155/2019/35249483524948Research on Fault Feature Extraction Method Based on NOFRFs and Its Application in Rotor FaultsYang Liu0Yulai Zhao1Jintao Li2Fangquan Xi3Shuanghe Yu4Ye Zhang5School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, ChinaSchool of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, ChinaSchool of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, ChinaSchool of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, ChinaSchool of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, ChinaGuodian Science and Technology Research Institute, Shenyang 110102, ChinaRub-impact between the rotating and static parts is a more common fault. The occurrence of faults is often accompanied by the generation of nonlinear phenomena. However, it is difficult to find out because the nonlinear characteristics are not obvious at the beginning of the fault. As a new frequency domain-based method, nonlinear output frequency response functions (NOFRFs) use the vibration response to extract the nonlinear characteristics of the system. This method has a better recognition rate for fault detection. Also, it has been applied in structural damages detection, but the high-order NOFRFs have the characteristics that the signals are weak and the features are difficult to extract. On this basis, the concept of the weighted contribution rate of the NOFRFs is proposed in this paper. The variable weighted coefficients with orders are used to amplify the influence of high-order NOFRFs on the nonlinearity of the system so as to extract its fault characteristics. The new index RI is proposed based on Clenshaw–Curtis quadrature formula to eliminate the effect of artificially selected weighted coefficients on sensitivity. Especially in the early stage of the fault, the new index varies greatly with the deepening of the fault. Both simulation and experimental results verify the validity and practicability of the new index. The new index has certain guiding significance in the detection of mechanical system faults.http://dx.doi.org/10.1155/2019/3524948 |
| spellingShingle | Yang Liu Yulai Zhao Jintao Li Fangquan Xi Shuanghe Yu Ye Zhang Research on Fault Feature Extraction Method Based on NOFRFs and Its Application in Rotor Faults Shock and Vibration |
| title | Research on Fault Feature Extraction Method Based on NOFRFs and Its Application in Rotor Faults |
| title_full | Research on Fault Feature Extraction Method Based on NOFRFs and Its Application in Rotor Faults |
| title_fullStr | Research on Fault Feature Extraction Method Based on NOFRFs and Its Application in Rotor Faults |
| title_full_unstemmed | Research on Fault Feature Extraction Method Based on NOFRFs and Its Application in Rotor Faults |
| title_short | Research on Fault Feature Extraction Method Based on NOFRFs and Its Application in Rotor Faults |
| title_sort | research on fault feature extraction method based on nofrfs and its application in rotor faults |
| url | http://dx.doi.org/10.1155/2019/3524948 |
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