Non-linear dynamic analysis of travelling-wave-type ultrasonic motors

Yosuke Nakagawa, Akira Saito, Takashi Maeno

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


First, transient response of a bar-type ultrasonic motor is measured using laser-doppler velocimeter in order to show the relationship between input parameters and the non- linear dynamic characteristics. Next, dynamical model of ultrasonic motor is constructed. The piezoelectric ceramics and stator's vibration are modeled as a second order system considering non-linear terms at piezoelectric ceramics and elastics of metal part of the stator. At the interface between the rotor and stator, three-dimensional discrete model using springs and dampers at the contact surface is introduced in order to calculate the friction force between them. Coulomb's friction model was introduced considering stick-slip at contact area. As a result, the validity of the mathematical model was confirmed hy showing that simulation results are in good agreement with those obtained by measurement.

Original languageEnglish
Pages (from-to)708-715
Number of pages8
JournalNihon Kikai Gakkai Ronbunshu, C Hen/Transactions of the Japan Society of Mechanical Engineers, Part C
Issue number3
Publication statusPublished - 2007 Mar


  • Contact analysis
  • Dynamics
  • Frictional loss
  • Non-linear characteristics
  • Stick-slip phenomenon
  • Ultrasonic motor

ASJC Scopus subject areas

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


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