Numerical analyses on multi-DOF ultrasonic motor - Development of analysis method and results

Research output: Contribution to journalConference article

1 Citation (Scopus)


A multi-DOF ultrasonic motor developed in our previous study has significant potentials for dexterous actuation. The ultrasonic motor provides multi-DOF rotation of a spherical rotor using three natural vibrations of a bar-shaped stator. In this paper, numerical analyses on the multi-DOF ultrasonic motor are conducted. First, a forward model of multi-DOF ultrasonic motor is developed considering the frictional condition between the rotor/stator. Using the forward model, driving state of the multi-DOF ultrasonic motor under arbitrary combination of vibrations is clarified. Second, an inverse model of the multi-DOF ultrasonic motor is also developed. The inverse model is constructed using experienced knowledge about ultrasonic motor and neural network technique. An appropriate input for the multi-DOF ultrasonic motor with regard to arbitrary rotational axis is estimated using the inverse model. The proposed models are available not only for our motor but for all multi-DOF ultrasonic motors.

Original languageEnglish
Pages (from-to)2387-2392
Number of pages6
JournalProceedings - IEEE International Conference on Robotics and Automation
Publication statusPublished - 2002 Jan 1
Event2002 IEEE International Conference on Robotics adn Automation - Washington, DC, United States
Duration: 2002 May 112002 May 15



  • Multi-DOF
  • Neural network
  • Simulation
  • Ultrasonic motor

ASJC Scopus subject areas

  • Software
  • Control and Systems Engineering
  • Artificial Intelligence
  • Electrical and Electronic Engineering

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