A Similarity Comparison Method of Homologous Fault Response Fragments under Variable Rotational Speed
Effective fault detection and diagnosis (FDD) for rotating machinery is always a focus issue in improving the prognostic and health management (PHM) of the equipments. The existing usage of similarity measurement has been widely spread in searching the homologous fault responses from vibration signa...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2020/8973678 |
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| author | Zhiyang He Weidong Cheng Weigang Wen |
| author_facet | Zhiyang He Weidong Cheng Weigang Wen |
| author_sort | Zhiyang He |
| collection | DOAJ |
| description | Effective fault detection and diagnosis (FDD) for rotating machinery is always a focus issue in improving the prognostic and health management (PHM) of the equipments. The existing usage of similarity measurement has been widely spread in searching the homologous fault responses from vibration signals, but most of them are just suitable for stable speed and cannot be applied in all variable speed conditions. In order to improve measurement performance, a fast-meshed phase portrait (FMPP) frame combining the phase-space technique and box-scoring calculation is proposed. Firstly, the variable-speed signal is divided into multiple undetermined fragments according to fault characteristic orders (FCOs). Secondly, the undetermined fragments are reconstructed into corresponding phase-space trajectories to overcome the time-delay matching inconsistency of the variable speed fragments. Thirdly, the phase-space trajectories are mapped into meshed phase portraits via box-scoring calculation. Such decisive calculation can effectively transforms the diverse unequal fragments into the phase diagrams with same size, which saves time for the subsequent similarity measurement. Finally, the proposed FMPP is tested both for accuracy and timeliness on a self-built bearing bench, where the order tracking (OT) and dynamic time warping (DTW) methods are used for the comparisons. The experiments proved the effectiveness of the proposed method. |
| format | Article |
| id | doaj-art-4e42d8de8ba54a2b8ee42b0e3910a195 |
| institution | OA Journals |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-4e42d8de8ba54a2b8ee42b0e3910a1952025-08-20T02:38:47ZengWileyShock and Vibration1070-96221875-92032020-01-01202010.1155/2020/89736788973678A Similarity Comparison Method of Homologous Fault Response Fragments under Variable Rotational SpeedZhiyang He0Weidong Cheng1Weigang Wen2School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, ChinaSchool of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, ChinaSchool of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, ChinaEffective fault detection and diagnosis (FDD) for rotating machinery is always a focus issue in improving the prognostic and health management (PHM) of the equipments. The existing usage of similarity measurement has been widely spread in searching the homologous fault responses from vibration signals, but most of them are just suitable for stable speed and cannot be applied in all variable speed conditions. In order to improve measurement performance, a fast-meshed phase portrait (FMPP) frame combining the phase-space technique and box-scoring calculation is proposed. Firstly, the variable-speed signal is divided into multiple undetermined fragments according to fault characteristic orders (FCOs). Secondly, the undetermined fragments are reconstructed into corresponding phase-space trajectories to overcome the time-delay matching inconsistency of the variable speed fragments. Thirdly, the phase-space trajectories are mapped into meshed phase portraits via box-scoring calculation. Such decisive calculation can effectively transforms the diverse unequal fragments into the phase diagrams with same size, which saves time for the subsequent similarity measurement. Finally, the proposed FMPP is tested both for accuracy and timeliness on a self-built bearing bench, where the order tracking (OT) and dynamic time warping (DTW) methods are used for the comparisons. The experiments proved the effectiveness of the proposed method.http://dx.doi.org/10.1155/2020/8973678 |
| spellingShingle | Zhiyang He Weidong Cheng Weigang Wen A Similarity Comparison Method of Homologous Fault Response Fragments under Variable Rotational Speed Shock and Vibration |
| title | A Similarity Comparison Method of Homologous Fault Response Fragments under Variable Rotational Speed |
| title_full | A Similarity Comparison Method of Homologous Fault Response Fragments under Variable Rotational Speed |
| title_fullStr | A Similarity Comparison Method of Homologous Fault Response Fragments under Variable Rotational Speed |
| title_full_unstemmed | A Similarity Comparison Method of Homologous Fault Response Fragments under Variable Rotational Speed |
| title_short | A Similarity Comparison Method of Homologous Fault Response Fragments under Variable Rotational Speed |
| title_sort | similarity comparison method of homologous fault response fragments under variable rotational speed |
| url | http://dx.doi.org/10.1155/2020/8973678 |
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