Vibration measurement for rotating disk using contactless laser excitation

Daisuke Miyamoto, Itsuro Kajiwara, Naoki Hosoya

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


This paper proposes a contactless vibration testing system for rotating disks based on an impulse response excited by a laser ablation. High power YAG pulse laser is used in this system for producing an ideal impulse force on structural surface without contact. The contactless vibration testing system is composed of a YAG laser, laser Doppler vibrometer and spectrum analyzer. This system makes it possible to measure vibration characteristics of structures under operation, such as vibration measurement of a rotating disk. The effectiveness of this system is confirmed by experimental and theoretical analyses. In this paper, a platter of hard disk drive is employed as an experimental object. Vibration characteristics of a rotating and non-rotating platter are measured and compared with the results of theoretical analysis.

Original languageEnglish
Pages (from-to)4402-4412
Number of pages11
JournalNihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
Issue number784
Publication statusPublished - 2011
Externally publishedYes


  • Impact testing
  • Impulse response
  • Laser ablation
  • Measurement
  • Vibration of continuous system
  • Vibration of rotating body

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering


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