Results 11 to 20 of about 4,321 (293)

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
doaj   +2 more sources

Non-Intrusive Measurement of Blade Tip Vibration in Turbomachines [PDF]

Volume 5: Manufacturing Materials and Metallurgy; Ceramics; Structures and Dynamics; Controls, Diagnostics and Instrumentation; Education; IGTI Scholar Award; General, 1991
It is discussed the need for non-intrusive monitoring of rotating blade vibration. The advantages over conventional techniques are outlined. The vibration of a compressor blade has been investigated by strain gages, with particular attention to time evolution of the frequency spectra, at different operating speeds of the machine.
L. Andrenelli, N. Paone, ROSSI, Gianluca, E. P. Tomasini   +3 more
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ECL5/CATANA: Comparative Analysis of Advanced Blade Vibration Measurement Techniques

International Journal of Turbomachinery, Propulsion and Power
A comprehensive understanding of aerodynamic instabilities, such as flutter, non-synchronous vibration (NSV), rotating stall, and forced response, is crucial for the safe and efficient operation of turbomachinery, particularly fans and compressors. These
Christoph Brandstetter, Alexandra P. Schneider, Anne-Lise Fiquet, Benoit Paoletti, Kevin Billon, Xavier Ottavy   +5 more
doaj   +5 more sources

Blade Vibration Measurements and Excitation Force Evaluation [PDF]

, 2015
Tip timing blade vibration measuring systems have become nowadays common for monitoring blade vibrations, due to rather easy and non-intrusive installation of sensors. The data collected by the sensors must be heavily processed in order to get the vibration time histories of all blades at rated speed or during a run up or run down transient.
BACHSCHMID, NICOLO', Pesatori, Emanuel, Bistolfi, Simone, CHATTERTON, STEVEN   +3 more
openaire   +2 more sources

Rotating blade vibration parameter identification based on genetic algorithm

Advances in Mechanical Engineering, 2023
In this paper, aiming at the identification of blade vibration parameters such as constant speed synchronization, constant speed asynchronous, and variable speed synchronization, the simulation platform Simulink is used to model the blade vibration ...
Shen Xiangxiang, Chen Guo, Liu Fuhai
doaj   +1 more source

Blade Crack Diagnosis Based on Blade Tip Timing and Convolution Neural Networks

Applied Sciences, 2023
The diagnosis of blade crack faults is critical to ensuring the safety of turbomachinery. Blade tip timing (BTT) is a non-contact vibration displacement measurement technique, which has been extensively studied for blade vibration condition monitoring ...
Guangya Zhu, Chongyu Wang, Wei Zhao, Yonghui Xie, Ding Guo, Di Zhang   +5 more
doaj   +1 more source

Blade Serial Number Identification Based on Blade Tip Clearance without OPR Sensor

Shock and Vibration, 2021
Blade serial number identification is one of the key issues in blade tip-timing vibration measurement without once-per-revolution (OPR) sensor. In order to overcome the shortcomings of the existing blade serial number identification methods without OPR ...
Liang Zhang, Qidi Wang, Huiqun Yuan, Xin Li   +3 more
doaj   +1 more source

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, Cong Chen, Yiming Xia, Qingxi Song, Junjun Cao   +4 more
doaj   +1 more source

Experimental and Numerical Study of Nonlinear Vibration in Compressor Stator Blade with Holding Ring Structure Considering Contact Friction

Applied Sciences, 2023
At present, there are very few vibration test designs for compressor stator blades in damped blade test research, and there is a lack of consideration of the holding ring structure of the blade installation.
Jiaobin Ma, Zhufeng Liu, Yonghui Xie, Di Zhang   +3 more
doaj   +1 more source

Non-Contact Measurement of Blade Vibration in an Axial Compressor [PDF]

Sensors, 2019
Complex blade responses such as a rotating stall or simultaneous resonances are common in modern engines and their observation can be a challenge even for state-of-the-art tip-timing systems and trained operators. This paper analyses forced vibrations of axial compressor blades, measured during the bench tests of the SO-3 turbojet.
Radoslaw Przysowa, Peter Russhard
openaire   +2 more sources