Multi-Keel Passive Prosthetic Foot Design Optimization Using the Lower Leg Trajectory Error Framework
Name
jmr_15_4_041001.pdf
Description
Published version
Size
843.94 KB
Format
Adobe PDF
Checksum (MD5)
01e15143be2f5cf321cda4eed6e3940c
Author(s)
Prost, Victor
Peterson, Heidi V
Winter V, Amos G
Date Issued
August 1, 2023
Journal
Journal of Mechanisms and Robotics
Publisher
ASME International
Citation
Prost, Victor, Peterson, Heidi V and Winter V, Amos G. 2023. "Multi-Keel Passive Prosthetic Foot Design Optimization Using the Lower Leg Trajectory Error Framework." Journal of Mechanisms and Robotics, 15 (4).
Version
Final published version
Abstract
People with lower-limb amputation in low- and middle-income countries (LMICs) lack access to adequate prosthetic devices that would restore their mobility and increase their quality of life. This is largely due to the cost and durability of existing devices. Single-keel energy storage and return (ESR) prosthetic feet have recently been developed using the lower leg trajectory error (LLTE) design framework to provide improved walking benefits at an affordable cost in LMICs. The LLTE framework optimizes the stiffness and geometry of a user’s prosthesis to match a target walking pattern by minimizing the LLTE value, a measure of how closely a prosthetic foot replicates a target walking pattern. However, these low-cost single-keel prostheses do not provide the required durability to fulfill International Standards Organization (ISO) testing, preventing their widespread use and adoption. Here, we developed a multi-keel foot parametric model and extended the LLTE framework to include the multi-keel architecture and durability requirements. Multi-keel designs were shown to provide 76% lower LLTE values, compared with single-keel designs while withstanding ISO fatigue and static tests, validating their durability. Given their single-part 2D extruded geometries, multi-keel feet designed with the extended LLTE framework could be cost-effectively manufactured, providing affordable and durable high-performance prostheses that improve the mobility of LMIC users.
MIT Department
Massachusetts Institute of Technology. Department of Mechanical Engineering
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1115/1.4055107
