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Damped CAPES 2D Spectral Estimation for Real-Valued Vibration Signals
Joint Authors
Dan, Dan-Hui
Zhao, Yi-Ming
Gong, Jiongxin
Source
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-08-26
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Abstract EN
We propose a 2D representation in the frequency-decay factor plane of an arbitrary real-world vibration signal.
The signal is expressed as the sum of a decayed-attenuation sine term modulated by an amplitude function and a noise residue.
We extend the combined approach of Capon estimation and amplitude and phase estimation (CAPES) to damped real vibration signals (DR-CAPES).
In the proposed DR-CAPES method, the high-resolution amplitude and phase are estimated simultaneously for both angular frequency and decay factor grids.
The performance of the proposed approach is tested numerically with noisy vibration data.
Results show that the DR-CAPES method has an excellent frequency resolution, which helps to overcome difficulties in spectrum estimation when vibration modes are very close, and a small bias, which makes it suitable for obtaining accurate amplitude spectrums.
The results also indicate that the proposed method can accurately estimate the amplitude spectrum with the use of averaging and denoising processes.
American Psychological Association (APA)
Dan, Dan-Hui& Gong, Jiongxin& Zhao, Yi-Ming. 2014. Damped CAPES 2D Spectral Estimation for Real-Valued Vibration Signals. Shock and Vibration،Vol. 2014, no. 2014, pp.1-11.
https://search.emarefa.net/detail/BIM-1047951
Modern Language Association (MLA)
Dan, Dan-Hui…[et al.]. Damped CAPES 2D Spectral Estimation for Real-Valued Vibration Signals. Shock and Vibration No. 2014 (2014), pp.1-11.
https://search.emarefa.net/detail/BIM-1047951
American Medical Association (AMA)
Dan, Dan-Hui& Gong, Jiongxin& Zhao, Yi-Ming. Damped CAPES 2D Spectral Estimation for Real-Valued Vibration Signals. Shock and Vibration. 2014. Vol. 2014, no. 2014, pp.1-11.
https://search.emarefa.net/detail/BIM-1047951
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1047951