FE Analysis and lda measurement of the dynamic rotor/stator. contact in a ring-type ultrasonic motor

Takashi Maeno, David B. Bogy

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

We study the dynamic contact characteristics between the rotor and stator of a ringtype ultrasonic motor by measurement and simulation. First, we measure the tangential and normal velocities and displacements of the rotor/stator interface using a LDA (laser Doppler anemometer). It is especially suitable for our measurement since it directly measures the velocity with high precision. Next, we solve the dynamic contact problem of the rotor/stator interface by use of finite element analysis taking into consideration inertia! effects and replacing the ring by an equivalent straight model of the rotor/stator. The calculated tangential and normal displacements and velocities of the rotor/stator are in good agreement with the measured ones. The effect of inertia was studied by changing the density of the rotor in the calculation. When the rotor's density is decreased to produce smaller natural frequencies, the velocity fluctuation and the frictional loss increase.

Original languageEnglish
Pages (from-to)625-631
Number of pages7
JournalJournal of Tribology
Volume115
Issue number4
DOIs
Publication statusPublished - 1993 Oct
Externally publishedYes

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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