Simulating eddy current sensor outputs for blade tip timing

Nidhal Jamia, Michael I. Friswell, Sami El-Borgi, Ralston Fernandes

Research output: Contribution to journalArticle

5 Citations (Scopus)

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 understand and optimize the measurement system becomes more important. This requires detailed modeling of eddy current sensors in the blade tip timing application; the current approaches often rely on experimental trials. Existing simulations for eddy current sensors have not considered the particular case of a blade rotating past the sensor. Hence, the novel aspect of this article is the development of a detailed quasi-static finite element model of the electro-magnetic field to simulate the integrated measured output of the sensor. This model is demonstrated by simulating the effect of tip clearance, blade geometry, and blade velocity on the output of the eddy current sensor. This allows an understanding of the sources of error in the blade time of arrival estimate and hence insight into the accuracy of the blade vibration measurement.

Original languageEnglish
JournalAdvances in Mechanical Engineering
Volume10
Issue number1
DOIs
Publication statusPublished - 1 Jan 2018

Fingerprint

Eddy currents
Sensors
Rotating machinery
Vibration measurement
Condition monitoring
Electromagnetic fields
Cracks
Geometry

Keywords

  • blade tip timing
  • Eddy current sensor
  • electro-magnetic field
  • quasi-static finite element model

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Simulating eddy current sensor outputs for blade tip timing. / Jamia, Nidhal; Friswell, Michael I.; El-Borgi, Sami; Fernandes, Ralston.

In: Advances in Mechanical Engineering, Vol. 10, No. 1, 01.01.2018.

Research output: Contribution to journalArticle

Jamia, Nidhal ; Friswell, Michael I. ; El-Borgi, Sami ; Fernandes, Ralston. / Simulating eddy current sensor outputs for blade tip timing. In: Advances in Mechanical Engineering. 2018 ; Vol. 10, No. 1.
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