Laboratory for Dynamics of Machines and Structures 
Measurement of the bending vibration frequencies of a rotating turbo wheel using an optical fibre reflective sensor
 J. Slavič, P. Čermelj, A. Babnik, J. Rejec, J. Možina and M. Boltežar
Measurement Science and Technology, 2002, vol. 13, 4, 477-482

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Abstract
An optical fibre reflective sensor was used to analyse the vibrations of a rotating turbo wheel up to 20 400 rpm. The measured signal required correction because of the natural unevenness of the turbo wheel and because of the variable deflection. Because the turbo wheel was rotating the signal became distorted and so we used a special method to extract the frequencies of the vibrations from the power spectra. The analysis showed increased intensity of the first three natural frequencies with an increased speed of rotation. The experimental results match very well with those obtained by numerical computation.
Authors

Associate Professor

Janko Slavič, PhD

  Ladisk, Faculty of Mechanical Engineering, University of Ljubljana
  janko.slavic@fs.uni-lj.si
  +386 1 4771 226
jankoslavic     jankoslavic    
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Director of R&D

Primož čermelj, PhD

  Iskra Mehanizmi, d.d., Lipnica
  pcermelj@iskra-mehanizmi.si
  +386 4 53 55 100
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Researcher

Aleš Babnik, PhD

  Kolt, Faculty of Mechanical Engineering, University of Ljubljana
  ales.babnik@fs.uni-lj.si
  +386 1 4771 151

R&D

Jožica Rejec, PhD

  Domel d.d., �elezniki
  jozica.rejec@domel.si
  

Full Professor

Janez Možina, PhD

  Kolt, Faculty of Mechanical Engineering, University of Ljubljana
  janez.mozina@fs.uni-lj.si
  +386 1 4771 616

Professor

Miha Boltežar, PhD

  Ladisk, Faculty of Mechanical Engineering, University of Ljubljana
  miha.boltezar@fs.uni-lj.si
  +386 1 4771 608
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