Results 21 to 30 of about 71,632 (231)
Parameter Identification of Bladed Assemblies Using a Subspace Method [PDF]
International Journal for Simulation and Multidisciplinary Design Optimization, 2008 This paper is aimed at identifying a dynamical model for bladed assemblies such as turbines. Unknown excitation forces are applied to bladed disk assemblies leading to forced vibration responses.
Salhi Bendali +2 more
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Sensors, 2017 Safety and performance of the turbo-engine in an aircraft is directly affected by the health of its blades. In recent years, several improvements to the sensors have taken place to monitor the blades in a non-intrusive way.
José Miguel Gil-García +3 more
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Tipping the Scales of Time [PDF]
Physical Therapy, 2000 I truly am pleased to see so many of you here today and want to thank you from the bottom of my heart for sharing this special day with me … being that this is the last Presidential Address of my term as President. However, to see so many people in the audience reminds me of a comment that was once made by Sir Winston Churchill when he was ...
openaire +1 more source
CALIBRATION OF BTT MEASUREMENT WITH RESPECT TO SENSOR POSITION OVER SHROUDED LSB
Acta Polytechnica CTU Proceedings, 2018 In order to increase efficiency and reliability of steam turbines, last stage blades are equipped with mid-span tie-boss and shroud. We can use Blade Tip-Timing method (BTT) to measure vibration of shrouded blades, but the measured level of vibration is ...
Tereza Dadáková, Zdeněk Kubín
doaj +1 more source
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
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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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
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Positive Feedback Defines the Timing, Magnitude, and Robustness of Angiogenesis
Cell Reports, 2019 Summary: Angiogenesis is driven by the coordinated collective branching of specialized leading “tip” and trailing “stalk” endothelial cells (ECs). While Notch-regulated negative feedback suppresses excessive tip selection, roles for positive feedback in ...
Donna J. Page +5 more
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International Journal of Rotating Machinery, 2007 Blade tip timing is a technique for the measurement of vibrations in rotating bladed assemblies. In Part I of this work a class of methods for the analysis of blade tip timing data from bladed assemblies undergoing two simultaneous synchronous resonances
J. Gallego-Garrido +3 more
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Simulating eddy current sensor outputs for blade tip timing
Advances in Mechanical Engineering, 2018 Blade tip timing is a contactless method used to monitor the vibration of blades in rotating machinery. Blade vibration and clearance are important diagnostic features for condition monitoring, including the detection of blade cracks.
Nidhal Jamia +3 more
doaj +1 more source