Dynamic analysis of an ultrasonic motor using point contact model

Tomoaki Mashimo, Kazuhiko Terashima

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)


We propose the dynamic modeling of a traveling wave ultrasonic motor using a point contact model between the stator and rotor. This model can simply and accurately estimate the transient response of the rotor motion. In this paper, we model the dynamic behavior of the motor torque and angular velocity based on the vibration amplitude of the elliptical motion generated in the ultrasonic motor. The use of a recent high-speed camera with a high-power lens (high-speed microscope) enables the observation of elliptical motion and the measurement of vibration amplitudes. We build a synchronous motor drive system including the high-speed microscope and verify the model experimentally. The proposed model has been in good agreement with the experimental results.

Original languageEnglish
Pages (from-to)15-21
Number of pages7
JournalSensors and Actuators, A: Physical
Publication statusPublished - Jul 6 2015
Externally publishedYes


  • Dynamics
  • Piezoelectric actuators
  • Ultrasonic motors
  • Vibration

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering


Dive into the research topics of 'Dynamic analysis of an ultrasonic motor using point contact model'. Together they form a unique fingerprint.

Cite this