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Undersampled Blade Tip-Timing Vibration Reconstruction under Rotating Speed Fluctuation: Uniform and Nonuniform Sensor Configurations
Joint Authors
He, Jing
Chen, Zhongsheng
Zhan, Chi
Source
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-08-14
Country of Publication
Egypt
No. of Pages
13
Main Subjects
Abstract EN
Blade tip-timing (BTT) is a promising method of online monitoring rotating blade vibrations.
Since BTT-based vibration signals are typically undersampled, how to reconstruct characteristic vibrations from BTT signals is a big challenge.
Existing reconstruction methods are mainly based on the assumption of constant rotation speeds.
However, rotating speed fluctuation is inevitable in many engineering applications.
In this case, the BTT sampling process should be nonuniform, which will cause existing reconstruction methods to be unavailable.
In order to solve this problem, this paper proposes a new reconstruction method based on nonlinear time transformation (NTT).
Firstly, the effects of rotating speed fluctuation on BTT vibration reconstruction are analyzed.
Next, the NTT of BTT sampling times under rotating speed fluctuation is presented.
Then, two NTT-based reconstruction algorithms are derived for uniform and nonuniform BTT sensor configurations, respectively.
Also several evaluation metrics of BTT vibration reconstruction under rotating speed fluctuation are defined.
Finally, numerical simulations are done to verify the proposed algorithms.
The results testify that the proposed NTT-based reconstruction method can reduce effectively the influence of rotating speed fluctuation and decrease the reconstruction error.
In addition, rotating speed fluctuation has more bad effects on the reconstruction method under nonuniform sensor configuration than under uniform sensor configuration.
For nonuniform BTT signal reconstruction under rotating speed fluctuation, more attentions should be paid on selecting proper angles between BTT sensors.
In summary, the proposed method will benefit for detecting early blade damages by reducing frequency aliasing.
American Psychological Association (APA)
Chen, Zhongsheng& He, Jing& Zhan, Chi. 2019. Undersampled Blade Tip-Timing Vibration Reconstruction under Rotating Speed Fluctuation: Uniform and Nonuniform Sensor Configurations. Shock and Vibration،Vol. 2019, no. 2019, pp.1-13.
https://search.emarefa.net/detail/BIM-1211567
Modern Language Association (MLA)
Chen, Zhongsheng…[et al.]. Undersampled Blade Tip-Timing Vibration Reconstruction under Rotating Speed Fluctuation: Uniform and Nonuniform Sensor Configurations. Shock and Vibration No. 2019 (2019), pp.1-13.
https://search.emarefa.net/detail/BIM-1211567
American Medical Association (AMA)
Chen, Zhongsheng& He, Jing& Zhan, Chi. Undersampled Blade Tip-Timing Vibration Reconstruction under Rotating Speed Fluctuation: Uniform and Nonuniform Sensor Configurations. Shock and Vibration. 2019. Vol. 2019, no. 2019, pp.1-13.
https://search.emarefa.net/detail/BIM-1211567
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1211567