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Design and characterization of a flextensional stage based on Terfenol-D actuator

Authors
  • Witthauer, Adam1
  • Kim, Gap-Yong1
  • Faidley, LeAnn2
  • Zou, Qingze3
  • Wang, Zhihua3
  • 1 Iowa State University, Department of Mechanical Engineering, Ames, IA, 50011, USA , Ames (United States)
  • 2 Wartburg College, Department of Engineering Science, Waverly, IA, 50677, USA , Waverly (United States)
  • 3 Rutgers University, Department of Mechanical and Aerospace Engineering, Piscataway, NJ, 08854, USA , Piscataway (United States)
Type
Published Article
Journal
International Journal of Precision Engineering and Manufacturing
Publisher
Springer Berlin Heidelberg
Publication Date
Jan 09, 2014
Volume
15
Issue
1
Pages
135–141
Identifiers
DOI: 10.1007/s12541-013-0316-3
Source
Springer Nature
Keywords
License
Yellow

Abstract

A machine for microforming was designed and built around a custom low-frequency, high-power Terfenol-D transducer coupled to a flextensional type lever system for displacement amplification. Separate bolt-on flexure joints were used instead of a traditional monolithic flextensional lever system design in order to reduce cost. A mathematical model of the transducer and lever system was created that matches blocked force with an 11% error and maximum displacement with a 2% error. Thermal response and hysteresis vs. frequency response were also tested. Using an 18 mm diameter 200 mm long Terfenol-D rod and a lever ratio of 10, the system is capable of up to 365 N of force and 1.6 mm of displacement with resolution of less than 1 μm.

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