Dynamic modelling of a traveling-wave type ultrasonic motor with beam teeth via finite elements

Chang-Po Chao*, Po Hung Lu, Chun Wei Chiu

*Corresponding author for this work

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

1 Scopus citations

Abstract

The study is dedicated to establish the dynamic model of a traveling-wave type ultrasonic motor (USM) with beam teeth via finite elements. The modeling is accomplished mainly by finite elements, the task of which consists of three parts - for stator, rotor and contact. It is first assumed that the complex dynamics of the stator emulates a single one-dimensional Euler-beam vibrating harmonically in the transverse direction. On the top surfaces of the stator are vertical beam teeth that is in contact with rotor, which is simply a thin disk fixed to spindle. The friction between the teeth tips and stator rotates the spindle moves the stator and finally rotates the disk to the desired speed. A contact model between beam tips and rotor disk with proper friction assumed is next built in conjunction with the established finite element model of the rotor disk. With a complete model in hands, the dynamics of the USM is predicted along with associated exerted torques. Experiments are finally conducted for collecting sets of data of rotation speeds versus torques that validate the effectiveness of the built models for the motor, stator and contact force.

Original languageEnglish
Title of host publicationASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC/CIE 2011
Pages1107-1113
Number of pages7
EditionPARTS A AND B
DOIs
StatePublished - 1 Dec 2011
EventASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC/CIE 2011 - Washington, DC, United States
Duration: 28 Aug 201131 Aug 2011

Publication series

NameProceedings of the ASME Design Engineering Technical Conference
NumberPARTS A AND B
Volume1

Conference

ConferenceASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC/CIE 2011
CountryUnited States
CityWashington, DC
Period28/08/1131/08/11

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