Results 41 to 50 of about 4,542 (246)
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
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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
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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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BTT & RFLB - THE OPTIMUM SET FOR STEAM TURBINE BLADES MONITORING
Acta Polytechnica CTU Proceedings, 2018 BTT, Blade Tip Timing system, is a commercially available system generating files of precise times of blade tips when passing sensors attached in a machine stator.
Miroslav Balda
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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. Although the fundamentals of the technique are simple, the analysis of data obtained in the presence of simultaneously occurring synchronous resonances is ...
J. Gallego-Garrido +2 more
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Dynamic Characteristics Analysis of 3D Blade Tip Clearance for Turbine Blades with Typical Cracks
International Journal of Aerospace Engineering, 2022 As well known, the crack is a typical fault of turbine blades, which is difficult to detect due to the weak fault features contained in the rotor vibration.
Xiaodong Zhang +5 more
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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
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High-Precision Extraction Method for Blade Tip-Timing Signal with Eddy Current Sensor
International Journal of Rotating Machinery, 2020 Online monitoring of high-speed rotating blades has always been a hot topic. Of the various methods, the blade tip timing (BTT) technique, based on eddy current sensors, is considered to be the most promising.
Ji-wang Zhang, Ke-qin Ding, Guang Chen
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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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High Temperature Magnetic Sensors for the Hot Section of Aeroengines
Aerospace, 2021 Magnetic sensors are widely used in aeroengines and their health management systems, but they are rarely installed in the engine hot section due to the loss of magnetic properties by permanent magnets with increasing temperature.
Edward Rokicki +3 more
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