A Similarity Comparison Method of Homologous Fault Response Fragments under Variable Rotational Speed
Joint Authors
Wen, Weigang
Cheng, Weidong
He, Zhiyang
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-01-29
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
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.
American Psychological Association (APA)
He, Zhiyang& Cheng, Weidong& Wen, Weigang. 2020. A Similarity Comparison Method of Homologous Fault Response Fragments under Variable Rotational Speed. Shock and Vibration،Vol. 2020, no. 2020, pp.1-12.
https://search.emarefa.net/detail/BIM-1213656
Modern Language Association (MLA)
He, Zhiyang…[et al.]. A Similarity Comparison Method of Homologous Fault Response Fragments under Variable Rotational Speed. Shock and Vibration No. 2020 (2020), pp.1-12.
https://search.emarefa.net/detail/BIM-1213656
American Medical Association (AMA)
He, Zhiyang& Cheng, Weidong& Wen, Weigang. A Similarity Comparison Method of Homologous Fault Response Fragments under Variable Rotational Speed. Shock and Vibration. 2020. Vol. 2020, no. 2020, pp.1-12.
https://search.emarefa.net/detail/BIM-1213656
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1213656