Results 21 to 30 of about 131 (106)
Multi-Stage Robust Bayesian High-Resolution Identification of Asynchronous Blade Vibrations Using Blade Tip Timing [PDF]
EntropyBlade Tip Timing (BTT) is an essential non-contact technique for monitoring vibrations in rotating machinery, but its practical accuracy is often degraded by noise, undersampling, and spectral leakage.
Qinglei Zhang, Xiwen Chen
doaj +2 more sources
Wavelet Transform-Based Damage Identification in Bladed Disks and Rotating Blades
Shock and Vibration, 2018 Blade vibration and blade clearance are effective diagnostic features for the identification of blade damage in rotating machines. Blade tip-timing (BTT) is a noncontact method that is often used to monitor the vibration and clearance of blades in a ...
P. Rajendran +3 more
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Vibration Parameters Identification of Rotating Blades Based on Blade Tip-Timing Sensor Waveforms
Applied Sciences, 2023 Blade tip-timing is one of the most widely used non-contact measurement methods for rotating blade vibration. The classic blade tip-timing method is to identify the vibration parameters of the blade based on the time of blade tip arrival to the tip ...
Liang Zhang, Qidi Wang, Xin Li
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Journal of Electrical and Computer Engineering, Volume 2023, Issue 1, 2023., 2023 The development of a network termed microgrid (MG) has been motivated owing to augmentation in renewable energy source (RES) infiltration along with the utilization of enhanced power electronic technologies. Recently, more popularity has been gained by the hybrid MG (HMG).
Ginbar Ensermu +6 more
wiley +1 more source
Whole genome population structure of North Atlantic kelp confirms high‐latitude glacial refugia
Molecular Ecology, Volume 31, Issue 24, Page 6473-6488, December 2022., 2022 Abstract Coastal refugia during the Last Glacial Maximum (~21,000 years ago) have been hypothesized at high latitudes in the North Atlantic, suggesting marine populations persisted through cycles of glaciation and are potentially adapted to local environments.
Trevor T. Bringloe +13 more
wiley +1 more source
Shock and Vibration, Volume 2021, Issue 1, 2021., 2021 Blade tip‐timing is one of the most effective methods for blade vibration parameters identification of turbomachinery. Once‐per revolution (OPR) sensor is usually used to determine the rotating speed and as a time reference. However, the OPR sensor leads to a large measurement error or even failure, or it is difficult to install.
Liang Zhang +3 more
wiley +1 more source
Applied Sciences, 2023 A new method for the synchronous vibration parameter identification of constant-speed rotating blades based on blade tip clearance (BTC) measurement and blade tip timing (BTT) is introduced.
Liang Zhang +4 more
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Prediction of Blade Tip Timing Sensor Waveforms Based on Radial Basis Function Neural Network
Applied Sciences, 2023 As the existing Blade Tip Timing (BTT) vibration measurement methods have serious under-sampling problems, where the blade resonance frequency is usually higher than the sampling frequency of the data acquisition system of the BTT method, resulting in ...
Liang Zhang +4 more
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Analysis and Calibration of Blade Tip-Timing Vibration Measurement Under Variable Rotating Speeds
IEEE Access, 2021 Blade tip timing (BTT) vibration measurement is a promising on-line blade monitoring method, but various uncertainties bring great challenge in engineering applications. Most existing works are based on the assumption of constant rotating speeds. However,
Zhongsheng Chen +3 more
doaj +1 more source
An Improved Circumferential Fourier Fit (CFF) Method for Blade Tip Timing Measurements
Applied Sciences, 2020 Rotating blade vibration measurements are very important for any turbomachinery research and development program. The blade tip timing (BTT) technique uses the time of arrival (ToA) of the blade tip passing the casing mounted probes to give the blade ...
Zhibo Liu +5 more
doaj +1 more source