Mixed-domain performance model of the piezoelectric traveling-wave motor and the development of a two-sided device

In recognition of the growing consideration of piezoelectric traveling-wave motors as suitable replacements for small-scale electromagnetic motors, the present work addresses two parallel objectives: (1) to develop an advanced modeling approach for the accurate prediction of steady-state performance of piezoelectric traveling-wave motors, and (2) to improve upon the typical piezoelectric traveling-wave motor configuration by investigating the novel implementation of two-sided operation. Firstly, a performance model of the piezoelectric traveling-wave motor has been developed that accounts for loss at the material level through the integration of complex material constants. In effect, all model parameters can be attributed to physically relevant properties, and, as demonstrated by the success of several experimental correlation studies, motor performance can be predicted independently of the measured characteristics of an existing device. Other key features of the model include a dynamic rotor model, a hysteretic stick-slip friction contact model, and generalization to accommodate non-ideal traveling-wave excitation. Critical to the cohesion of the model, a mixed-domain formulation combines the ease and accuracy of deriving the nonlinear contact forces in the time domain and the efficiency of equilibrating the modal forces in the frequency domain.

Department dc:contributor.department

Massachusetts Institute of Technology. Dept. of Aeronautics and Astronautics.

Grantor dc:publisher

Massachusetts Institute of Technology

Year dc:date.issued

2002

Author dc:creator

• Glenn, Timothy Scott, 1971-

Advisor dc:contributor.advisor

• Nesbitt W. Hagood, IV.

• Aeronautics and Astronautics.

Statement dc:rights

• M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission.

Licence dc:rights.uri

• http://dspace.mit.edu/handle/1721.1/7582

Language dc:language.iso

eng

Handle dc:identifier.uri

http://hdl.handle.net/1721.1/16875

OAI identifier oai:identifier

oai:dspace.mit.edu:1721.1/16875