2018
DOI: 10.1177/1687814017748020
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Simulating eddy current sensor outputs for blade tip timing

Abstract: 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. Eddy current sensors are a practical choice for blade tip timing and have been used extensively. As the data requirements from the timing measurement become more stringent and the systems become more complicated, including the use of multiple sensors, the ability to fully underst… Show more

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Cited by 14 publications
(10 citation statements)
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“…Initial investigations by the authors modelled a P-ECS [32], and simulated a rotating bladed disk of simple geometry composed of 4 simplified rectangular blades and surrounded by a casing onto which an eddy current sensor was attached. The aim was to simulate the measurement process used for blade tip timing using ECS.…”
Section: Summary Of Previous Models By the Authorsmentioning
confidence: 99%
See 1 more Smart Citation
“…Initial investigations by the authors modelled a P-ECS [32], and simulated a rotating bladed disk of simple geometry composed of 4 simplified rectangular blades and surrounded by a casing onto which an eddy current sensor was attached. The aim was to simulate the measurement process used for blade tip timing using ECS.…”
Section: Summary Of Previous Models By the Authorsmentioning
confidence: 99%
“…The test rig design (a) Blade (b) Disk (c) Bladed-disk assembly et al[32], the initial geometry parameters of the bladed disk were fixed. A rectangular blade with 100 mm length, 31 mm width and 4 mm thickness was designed, as shown inFigure 2a.…”
mentioning
confidence: 99%
“…However, the minimal clearance existing between the moving blades with high speed and the static cabinet is not able to be directly measured by conventional approaches. Recently, quite a number of novel methods for fast and accurate BTC measurement have been developed, such as optical methods [ 13 , 14 , 15 , 16 ] based on the intensity modulation of the reflected light, capacitance method [ 17 , 18 , 19 , 20 ] by constructed capacitance between the cabinet and blade tip, eddy current method [ 21 , 22 , 23 ] by installing the sensor coil probe in the cabinet to form an eddy current on the blade tip surface, and the microwave method [ 24 , 25 , 26 ] based on the principle, which is similar to a short range radar system. At present, optical methods and capacitance methods are widely used [ 27 , 28 , 29 , 30 ], generally at the R&D stage of engine.…”
Section: Introductionmentioning
confidence: 99%
“…In the case of a precision spherical joint, the clearance measurement can be achieved by detecting the eccentric displacements of a ball (3-DOF motion in space) and the socket (fixed in space). Many methods have been proposed for the clearance measurement in industrial applications, for example, the inductive sensor-based method [ 3 ], the optical fiber-based method [ 4 ], the microwave-based method [ 5 ], and other methods based on eddy current sensors [ 6 ] or capacitive sensors [ 7 ]. However, studies focused on the clearance measurement of a precision spherical joint have been rarely reported.…”
Section: Introductionmentioning
confidence: 99%