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A Pneumatic Artificial Muscle Actuated Above-Knee Prosthesis

[+] Author Affiliations
Garrett Waycaster, Sai-Kit Wu, Xiangrong Shen

The University of Alabama, Tuscaloosa, AL

Paper No. DSCC2010-4097, pp. 793-800; 8 pages
doi:10.1115/DSCC2010-4097
From:
  • ASME 2010 Dynamic Systems and Control Conference
  • ASME 2010 Dynamic Systems and Control Conference, Volume 1
  • Cambridge, Massachusetts, USA, September 12–15, 2010
  • Conference Sponsors: Dynamic Systems and Control Division
  • ISBN: 978-0-7918-4417-5 | eISBN: 978-0-7918-3884-6
  • Copyright © 2010 by ASME

abstract

This paper describes the mechanical design and control approach for an above-knee (AK) prosthesis actuated by pneumatic artificial muscle. Pneumatic artificial muscle (PAM) affords great potential in prosthetics, since this type of actuator features a high power density, and similar characteristics to human muscles. However, there is no application of PAM in AK prosthetics in existing literature to the best knowledge of the authors. In this paper, a design of the prosthesis is presented, which provides sufficient actuation torque for the knee joint in energy consuming locomotive functions such as fast walking and stair climbing. The corresponding control approach is also presented, which combines an impedance-based locomotive controller with a lower-level sliding-mode torque control approach. Experiments on the proposed AK prosthesis have also been conducted to demonstrate the ability to mimic normal gait characteristics.

Copyright © 2010 by ASME
Topics: Prostheses , Muscle , Knee

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