Transient response of wedge-wave rotary ultrasonic motors

Tai H. Yu*, Ching-Chung Yin

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

This paper presents an effort to improve performance of the wedge-wave ultrasonic motors (WW-USM) driven by circumferentially traveling flexural waves. In general, USM is operated in the vicinity of the resonant frequency of a specific vibration mode, which needs to be well separated away from the resonant frequencies of other modes. In the current prototype, transient response to the designed flexural mode is accompanied by longitudinal modes because of poling of the PZT tube and electrode layout around the tube. Uncertain disturbance induced at the instant of switching on/off or changing direction of the motor were found through both simulation and measurement. The fluctuations are attributed to unexpected vibration modes occurring around the operating frequency. Simulated results indicate that the performance has been improved if the electrodes are placed over the entire wavelength around the hoop of PZT tube and/or the tube is periodically poled through the thickness in alternate directions. Transient response becomes smooth and has twice the amplitude of displacement when the longitudinal modes are suppressed from excitation of WW-USM.

Original languageEnglish
Title of host publicationProceedings of the 2010 5th IEEE Conference on Industrial Electronics and Applications, ICIEA 2010
Pages639-643
Number of pages5
DOIs
StatePublished - 1 Sep 2010
Event5th IEEE Conference on Industrial Electronics and Applications, ICIEA 2010 - Taichung, Taiwan
Duration: 15 Jun 201017 Jun 2010

Publication series

NameProceedings of the 2010 5th IEEE Conference on Industrial Electronics and Applications, ICIEA 2010

Conference

Conference5th IEEE Conference on Industrial Electronics and Applications, ICIEA 2010
CountryTaiwan
CityTaichung
Period15/06/1017/06/10

Keywords

  • Alternate poling
  • Full wavelength electrodes
  • Ultrasonic motor
  • Wedge wave

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