Special Section Technical Briefs

A Pneumatically Actuated Transtibial Prosthesis1

[+] Author and Article Information
Hao Zheng, Xiangrong Shen

Department of Mechanical Engineering,
The University of Alabama,
Tuscaloosa, AL 35487

Accepted and presented at The Design of Medical Devices Conference (DMD2015), April 13–16, 2015, Minneapolis, MN, USA.

Manuscript received March 3, 2015; final manuscript received May 7, 2015; published online July 16, 2015. Editor: Arthur Erdman.

J. Med. Devices 9(3), 030919 (Sep 01, 2015) (2 pages) Paper No: MED-15-1075; doi: 10.1115/1.4030597 History: Received March 03, 2015; Revised May 07, 2015; Online July 16, 2015

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Winter, D. A., 1991, The Biomechanics and Motor Control of Human Gait: Normal, Elderly and Pathological, 2nd ed., University of Waterloo Press, Waterloo, ON, Canada.
Hsu, M. J., Nielsen, D. H., Lin-Chan, S. J., and Shurr, D., 2006, “The Effects of Prosthetic Foot Design on Physiologic Measurements, Self-Selected Walking Velocity, and Physical Activity in People With Transtibial Amputation,” Arch. Phys. Med. Rehabil., 87(1), pp. 123–129. [CrossRef] [PubMed]
Au, S., Weber, J., and Herr, H., 2009, “Powered Ankle-Foot Prosthesis Improves Walking Metabolic Economy,” IEEE Trans. Rob., 25(1), pp. 51–66. [CrossRef]
Hitt, J., Bellman, R., Holgate, M., Sugar, T., and Hollander, K., 2007, “The SPARKy (Spring Ankle With Regenerative Kinetics) Project: Design and Analysis of a Robotic Transtibial Prosthesis With Regenerative Kinetics,” ASME Paper No. DETC2007-34512. [CrossRef]
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Fig. 1

Actuation mechanism of the powered ankle

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Fig. 2

The TT prosthesis prototype

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Fig. 3

Comparison of the required torque for locomotion versus the torque capacity of the powered joint

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Fig. 4

A test subject fitted with the powered TT prosthesis



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