A joint project of the Graduate School, Peabody College, and the Jean & Alexander Heard Library

Title page for ETD etd-11142014-210221

Type of Document Dissertation
Author Mitchell, Jason Edward
Author's Email Address jason.e.mitchell@vanderbilt.edu
URN etd-11142014-210221
Title Design of modular self contained knee and ankle prostheses
Degree PhD
Department Mechanical Engineering
Advisory Committee
Advisor Name Title
Michael Goldfarb Committee Chair
Eric Barth Committee Member
George Cook Committee Member
Paul King Committee Member
Robert Webster Committee Member
  • powered prosthetic
Date of Defense 2014-08-13
Availability unrestricted
Losing a lower limb and specifically the power that it generates, has a major impact on ambulation including having to expend more metabolic energy and exert more hip power and torque on the affected side. There are currently a small number of commercially available powered prostheses but they are not capable of providing the full range of motion and power of the lost limb. Additionally there are no prostheses which have both a powered knee and ankle joint. It is the hypothesis of this work that lower limb prosthetic devices can be designed which provide biomechanically normal levels of torque, speed, and range of motion in self-contained, reliable, quiet, and anatomical packages. Described herein is the mechanical design, development and testing of several such devices. Initial work focused on the development of several key components including a ground contact sensing load cell, a biasing spring foot, and a robust and compact transmission design. Subsequent work incorporated these components into a transfemoral prosthesis with powered knee and ankle joints. In addition, a transtibial version was fabricated with a powered ankle joint. Both of these designs conform closely to the anatomical envelope of an average sized male limb. Experiments with amputee subjects validate the design through the demonstration of kinematics and kinetics that closely match those of the lost limb.
  Filename       Size       Approximate Download Time (Hours:Minutes:Seconds) 
 28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access 
  Mitchell.pdf 4.89 Mb 00:22:37 00:11:38 00:10:10 00:05:05 00:00:26

Browse All Available ETDs by ( Author | Department )

If you have more questions or technical problems, please Contact LITS.