Design and Qualitative Testing of a Prosthetic Foot With Rotational Ankle and Metatarsal Joints to Mimic Physiological Roll-Over Shape
Author(s)
Olesnavage, Kathryn; Winter, Amos G.
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This paper presents the analysis, design, and preliminary testing of a prototype prosthetic foot for use in India. A concept consisting of a rigid structure with rotational joints at the ankle and metatarsal with rotational stiffnesses provided by springs is discussed. Because literature suggests that prosthetic feet that exhibit roll-over shapes similar to that of physiological feet allow more symmetric gait, the joint stiffnesses were optimized to obtain the best fit between the roll-over shape of the prototype and of a physiological foot. Using a set of published gait data for a 56.7 kg subject, the optimal stiffness values for roll-over shape that also permit the motion required for natural gait were found to be 9.3 N·m/deg at the ankle and 2.0 N·m/deg at the metatarsal. The resulting roll-over shape has an R2 value of 0.81 when compared with the physiological roll-over shape. The prototype was built and tested in Jaipur, India. Preliminary qualitative feedback from testing was positive enough to warrant further development of this design concept.
Date issued
2015-08Department
MIT-SUTD Collaboration Office; Massachusetts Institute of Technology. Global Engineering and Research Laboratory; Massachusetts Institute of Technology. Department of Mechanical EngineeringJournal
Volume 5A: 39th Mechanisms and Robotics Conference
Publisher
American Society of Mechanical Engineers
Citation
Olesnavage, Kathryn M., and Amos G. Winter. “Design and Qualitative Testing of a Prosthetic Foot With Rotational Ankle and Metatarsal Joints to Mimic Physiological Roll-Over Shape.” Volume 5A: 39th Mechanisms and Robotics Conference (August 2, 2015).
Version: Final published version
ISBN
978-0-7918-5712-0