A Novel Diagnostic Feature for a Wind Turbine Imbalance Under Variable Speed Conditions
Abstract
:1. Introduction
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- To investigate the nonstationary dynamics of a wind turbine rotor via an equivalent mass–spring–damper system under centrifugal excitation.
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- To find a closed-form expression describing the dependency between the rotational speed and the fundamental rotation harmonic intensity.
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- To propose a speed-invariant diagnostic feature for imbalance fault diagnosis in wind turbines via simplifying the closed-form dependency for low-speed systems.
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- To adopt the short-time chirp Fourier transform and process the experimental vibration data collected from a 2.3 MW wind turbine with a permissible imbalance.
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- To obtain the local interference level and obtain the residuals describing the net feature values.
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- To normalize the residuals by the local interference levels.
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- To extract the conventional and the proposed diagnostic features and to investigate their dependencies on the rotational speed.
2. Theoretical Background, Diagnostic Feature Proposition and Experimental Setup
2.1. Theoretical Background
2.2. Feature Extraction
2.3. Experimental Setup
3. Results and Discussion
4. Conclusions
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- Investigate variable speed imbalance diagnosis in rotating machinery while simultaneously contracting a shaft misalignment.
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- Investigate variable speed imbalance diagnosis in rotating machinery while simultaneously contracting blade fatigue cracks.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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0.02 | 0.09 | 0.27 | 0.38 | 0.12 | 0.06 | |
0.04 | 0.2 | 0.57 | 0.79 | 0.26 | 0.13 | |
0.08 | 0.35 | 0.94 | 1.26 | 0.45 | 0.23 |
ADXL354B | PCB 3743F112G | |
---|---|---|
Type | 3-axis MEMS sensor | 3-axis MEMS sensor |
Sensitivity | 200 mV/g | 1350 mV/g |
Measurement range | ± | ± |
Operational frequency range | 0–250 Hz | 0–1.5 kHz |
Resonance frequency | 2.4 kHz | 1.2 kHz |
Typical nonlinearity | 0.3% | 0.1% |
Typical transverse sensitivity | 1% | 1% |
Operating temperature range | −40 °C to +125 °C | −54 °C to +121 °C |
Temperature sensitivity change within the operational range | ± | ± |
S | ||
---|---|---|
direction | 0.05 | 0.13 |
direction | 1.28 | 0.000 |
direction | 0.002 | 0.15 |
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Askari, A.R.; Gelman, L.; King, R.; Hickey, D.; Ball, A.D. A Novel Diagnostic Feature for a Wind Turbine Imbalance Under Variable Speed Conditions. Sensors 2024, 24, 7073. https://doi.org/10.3390/s24217073
Askari AR, Gelman L, King R, Hickey D, Ball AD. A Novel Diagnostic Feature for a Wind Turbine Imbalance Under Variable Speed Conditions. Sensors. 2024; 24(21):7073. https://doi.org/10.3390/s24217073
Chicago/Turabian StyleAskari, Amir R., Len Gelman, Russell King, Daryl Hickey, and Andrew D. Ball. 2024. "A Novel Diagnostic Feature for a Wind Turbine Imbalance Under Variable Speed Conditions" Sensors 24, no. 21: 7073. https://doi.org/10.3390/s24217073