Results 11 to 20 of about 3,783 (258)
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 +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 +5 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 +4 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 +3 more
doaj +1 more source
Shock and Vibration, 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
Liang Zhang, Huiqun Yuan, Xin Li
doaj +1 more source
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 +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
Dynamic Response of a Composite Fan Blade Excited Instantaneously by Multiple MFC Actuators
Aerospace, 2022 The vibration characteristics of a composite fan blade are much more complex than those of a solid titanium fan blade due to the anisotropic material properties and complex excitations coming from unsteady flow and mechanically induced vibration. In this
Yong Chen +4 more
doaj +1 more source
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 +3 more
openaire +2 more sources
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