0

Full Content is available to subscribers

Subscribe/Learn More  >

Stiffness Controlled Piezoelectric Stick-Slip Actuator for Rapid Positioning Applications

[+] Author Affiliations
Leon M. Headings, Gregory N. Washington

Ohio State University

Paper No. IMECE2005-80916, pp. 249-258; 10 pages
doi:10.1115/IMECE2005-80916
From:
  • ASME 2005 International Mechanical Engineering Congress and Exposition
  • Aerospace
  • Orlando, Florida, USA, November 5 – 11, 2005
  • Conference Sponsors: Aerospace Division
  • ISBN: 0-7918-4210-X | eISBN: 0-7918-3769-6
  • Copyright © 2005 by ASME

abstract

Rotary screw-type stick-slip actuators driven by smart materials offer the attractive characteristics of large stroke, fine resolution, high power-off holding force, and relative simplicity to manufacture. However, the actuation speed of current rotary stick-slip actuators limits their applications. The research presented in this study focuses on rapid positioning applications and involves the development of two mechanism designs. Both designs utilize piezoelectric stacks driven by sawtooth waves to provide stick-slip contact between two partially threaded jaws and a 1/4-80 screw. The first mechanism design utilizes two piezoelectric stacks in a push-pull configuration. The motion of the two stacks is coupled through a lever amplification mechanism. The second design uses a single stack to directly drive the jaws without amplification. However, a second stack is oriented perpendicular to the first stack and driven with a triggered square wave. This stack varies the normal and thus frictional force between the jaws and screw, permitting more efficient slipping and sticking of the actuator. This allows for potential increases in both output speed and force. Existing actuators were modeled using both theoretical and finite element analysis techniques. These results were compared with experimental data to validate the models.

Copyright © 2005 by ASME

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In