Modeling of Preload Controllable Rotary Ultrasonic Motors

• MUSTAFA ABDULLAH

  Graduate School of Frontier Sciences, The University of Tokyo

• MORITA TAKESHI

  Graduate School of Frontier Sciences, The University of Tokyo

Abstract

Rotary ultrasonic motors (USM) are promising piezoelectric devices as a leading next-generation of actuators. For commercialization purposes, the performance of the motor needs to be well-predicted at the design phase. To achieve this goal, mathematical modeling of USM is an essential requirement. Multiple models have already been proposed, and simulations have successfully matched the experimental results. The effect of preload and vibration amplitude is highly stressed in these models. Unfortunately, most of these models were developed under assumptions of a fixed preload force and high resonance vibration amplitude. Based on our current research, dynamic preload control has been employed to achieve high-efficiency wide range operation under non-resonance conditions. Thus, there was a need to develop a more comprehensive model to include the effects of dynamic preload as well as non-resonance operation. Through modeling of the stator/rotor interface, the effect of the vibration amplitude and preload on USM performance was identified. Simulations suggest operating USM at low preloads and high vibration amplitudes for maximum mechanical efficiency.

Journal

• Proceedings of JSPE Semestrial Meeting

  Proceedings of JSPE Semestrial Meeting 2019S (0), 750-751, 2019-03-01

  The Japan Society for Precision Engineering

Keywords

• Rotary Ultrasonic Motors
• Preload Control
• Optimum Driving
• Modeling

Details

• CRID: 1390845702276051328
• NII Article ID: 130007702779
• DOI: 10.11522/pscjspe.2019s.0_750
• Text Lang: en
• Data Source:
  • JaLC
  • CiNii Articles
• Abstract License Flag: Disallowed