Journal
PROSTHETICS AND ORTHOTICS INTERNATIONAL
Volume 38, Issue 5, Pages 400-404Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/0309364613505108
Keywords
Prosthetic foot; viscoelastic; prosthetic design
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Funding
- Iran National Science Foundation, Tehran, Iran
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Background and aim: In the present study, a new approach was applied to design and develop a viscoelastic ankle-foot prosthesis. The aim was to replicate the intact ankle moment-angle loop in the normal walking speed. Technique: The moment-angle loop of intact ankle was divided into four parts, and the appropriate models including two viscoelastic units of spring-damper mechanism were considered to replicate the passive ankle dynamics. The developed prototype was then tested on a healthy subject with the amputee gait simulator. The result showed that prosthetic ankle moment-angle loop was similar to that of intact ankle with the distinct four periods. Discussion: The findings suggest that the prototype successfully provided the human ankle passive dynamics. Therefore, the viscoelastic units could imitate the four periods of a normal gait.
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