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Multifractional Brownian Motion and Quantum-Behaved Partial Swarm Optimization for Bearing Degradation Forecasting
Joint Authors
Wanqing, Song
Cattani, Carlo
Chen, Xiaoxian
Zio, Enrico
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-01-31
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
Gradual degradation of the bearing vibration signal is usually studied as a nonstationary stochastic time series.
Roller bearings are working at high speed in a heavy load environment so that the combination of bearing faults gradually degraded during the rotation might lead to unpredicted catastrophic accidents.
The degradation process has the property of long-range dependence (LRD), so that the fractional Brownian motion (fBm) is taken into account for a prediction model.
Because of the dramatic changes in the bearing degradation process, the Hurst exponent that describes the fBm will change during the degradation process.
A priori Hurst value of the conventional fBm in the prediction is fixed, thus inducing a minor accuracy of the prediction.
To avoid this problem, we propose an improved prediction method.
Based on the following steps, at the initial data processing, a skip-over factor is selected as the characteristics parameter of the bearing degradation process.
A multifractional Brownian motion (mfBm) replaces the fBm for the degradation modeling.
We will show that also our mfBm has the same property of long-range dependence as the fBm.
Moreover, a time-varying Hurst exponent H(t) is taken to replace the constant H in fBm.
Finally, we apply the quantum-behaved partial swarm optimization (QPSO) to optimize H(t) for a finite interval.
Some tests and corresponding experimental results will show that our model QPSO + mfBm have a much better performance on the prediction effect than fBm.
American Psychological Association (APA)
Wanqing, Song& Chen, Xiaoxian& Cattani, Carlo& Zio, Enrico. 2020. Multifractional Brownian Motion and Quantum-Behaved Partial Swarm Optimization for Bearing Degradation Forecasting. Complexity،Vol. 2020, no. 2020, pp.1-9.
https://search.emarefa.net/detail/BIM-1144424
Modern Language Association (MLA)
Wanqing, Song…[et al.]. Multifractional Brownian Motion and Quantum-Behaved Partial Swarm Optimization for Bearing Degradation Forecasting. Complexity No. 2020 (2020), pp.1-9.
https://search.emarefa.net/detail/BIM-1144424
American Medical Association (AMA)
Wanqing, Song& Chen, Xiaoxian& Cattani, Carlo& Zio, Enrico. Multifractional Brownian Motion and Quantum-Behaved Partial Swarm Optimization for Bearing Degradation Forecasting. Complexity. 2020. Vol. 2020, no. 2020, pp.1-9.
https://search.emarefa.net/detail/BIM-1144424
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1144424