Concept Through Preliminary Bench Testing of a Powered Lower Limb Prosthetic Device.

This paper outlines the design and testing of a powered ankle prosthesis, which utilizes a four-bar mechanism in conjunction with a spring and motor that mimics nonamputee (normal) ankle moments. This approach would enable transtibial (below the knee) amputees to walk at a normal speed with minimal energy input. The design takes into account the energy supplied by the wearer required to achieve many of the desired characteristics of a normal gait. A proof-of-concept prototype prosthesis was designed, optimized, fabricated, and tested with the purpose of demonstrating its ability to match crucial ankle moments during the stance phase of gait. Testing of this prosthesis proved crucial in determining the prosthesis' capabilities and in evaluating this approach.

[1]  Thomas G. Sugar,et al.  A novel control algorithm for wearable robotics using phase plane invariants , 2009, 2009 IEEE International Conference on Robotics and Automation.

[2]  Gerhard Schweitzer,et al.  Finite-state control of a trans-femoral (TF) prosthesis , 2002, IEEE Trans. Control. Syst. Technol..

[3]  J. Perry,et al.  Prosthetic weight acceptance mechanics in transtibial amputees wearing the Single Axis, Seattle Lite, and Flex Foot. , 1997, IEEE transactions on rehabilitation engineering : a publication of the IEEE Engineering in Medicine and Biology Society.

[4]  Michael Goldfarb,et al.  Self-contained powered knee and ankle prosthesis: Initial evaluation on a transfemoral amputee , 2009, 2009 IEEE International Conference on Rehabilitation Robotics.

[5]  J. Lehmann,et al.  Comprehensive analysis of energy storing prosthetic feet: Flex Foot and Seattle Foot Versus Standard SACH foot. , 1993, Archives of physical medicine and rehabilitation.

[6]  Hugh M. Herr,et al.  Powered Ankle--Foot Prosthesis Improves Walking Metabolic Economy , 2009, IEEE Transactions on Robotics.

[7]  Philip A. Voglewede,et al.  Active Component Lower Limb Prosthetic Device Research: Concept and Design , 2007 .

[8]  Thomas G. Sugar,et al.  The SPARKy (Spring Ankle With Regenerative Kinetics) Project: Design and Analysis of a Robotic Transtibial Prosthesis With Regenerative Kinetics , 2007 .

[9]  S. Gard,et al.  The human ankle during walking: implications for design of biomimetic ankle prostheses. , 2004, Journal of biomechanics.

[10]  Matthew A. Holgate,et al.  The SPARKy (Spring Ankle with Regenerative kinetics) project: Choosing a DC motor based actuation method , 2008, 2008 2nd IEEE RAS & EMBS International Conference on Biomedical Robotics and Biomechatronics.

[11]  Robert Ilg,et al.  An efficient robotic tendon for gait assistance. , 2006, Journal of biomechanical engineering.

[12]  Singiresu S. Rao.  Engineering Optimization : Theory and Practice , 2010 .

[13]  Andrew H Hansen,et al.  Roll-over shapes of human locomotor systems: effects of walking speed. , 2004, Clinical biomechanics.

[14]  D. Lefeber,et al.  A pneumatically powered below-knee prosthesis: Design specifications and first experiments with an amputee , 2008, 2008 2nd IEEE RAS & EMBS International Conference on Biomedical Robotics and Biomechatronics.

[15]  D. Winter.  Energy generation and absorption at the ankle and knee during fast, natural, and slow cadences. , 1983, Clinical orthopaedics and related research.

[16]  T.G. Sugar,et al.  Control algorithms for ankle robots: A reflection on the state-of-the-art and presentation of two novel algorithms , 2008, 2008 2nd IEEE RAS & EMBS International Conference on Biomedical Robotics and Biomechatronics.

[17]  J. Perry,et al.  Energy expenditure during ambulation in dysvascular and traumatic below-knee amputees: a comparison of five prosthetic feet. , 1995, Journal of rehabilitation research and development.

[18]  Michael Goldfarb,et al.  Design and Control of a Powered Transfemoral Prosthesis , 2008, Int. J. Robotics Res..

[19]  David N. Rocheleau,et al.  Design for Improved Trans-Tibial Prosthetic Devices Using Four Bar Mechanisms , 2005 .

[20]  Hugh M. Herr,et al.  Powered ankle-foot prosthesis to assist level-ground and stair-descent gaits , 2008, Neural Networks.

[21]  Robert L. Norton,et al.  Design of machinery : an introduction to the synthesis and analysis of mechanisms and machines , 1999 .

[22]  J. Czerniecki,et al.  BIOMECHANICAL ANALYSIS OF THE INFLUENCE OF PROSTHETIC FEET ON BELOW-KNEE AMPUTEE WALKING , 1991, American journal of physical medicine & rehabilitation.

[23]  S.K. Au,et al.  Powered Ankle-Foot Prosthesis for the Improvement of Amputee Ambulation , 2007, 2007 29th Annual International Conference of the IEEE Engineering in Medicine and Biology Society.

[24]  Blake Hannaford,et al.  Development of Powered Prosthetic Lower Limb , 1998 .

[25]  R. Brand,et al.  The biomechanics and motor control of human gait: Normal, elderly, and pathological , 1992 .

[26]  David A. Winter,et al.  Biomechanics and Motor Control of Human Movement , 1990 .

[27]  J. Lehmann,et al.  Comprehensive analysis of dynamic elastic response feet: Seattle Ankle/Lite Foot versus SACH foot. , 1993, Archives of physical medicine and rehabilitation.

[28]  D A Winter,et al.  Mechanical efficiency during gait of adults with transtibial amputation: a pilot study comparing the SACH, Seattle, and Golden-Ankle prosthetic feet. , 1998, Journal of rehabilitation research and development.

[29]  Mark L. McMulkin,et al.  Comparison of Three Pediatric Prosthetic Feet During Functional Activities , 2004 .

[30]  Susan Sienko Thomas,et al.  Comparison of the Seattle Lite Foot and Genesis II Prosthetic Foot during walking and running , 2000 .

[31]  T.G. Sugar,et al.  SPARKy 3: Design of an active robotic ankle prosthesis with two actuated degrees of freedom using regenerative kinetics , 2008, 2008 2nd IEEE RAS & EMBS International Conference on Biomedical Robotics and Biomechatronics.

[32]  Nicholas P. Fey,et al.  Compensatory mechanisms in below-knee amputee gait in response to increasing steady-state walking speeds. , 2008, Gait & posture.

[33]  Hugh M Herr,et al.  Horizons in Prosthesis Development for the Restoration of Limb Function , 2006, The Journal of the American Academy of Orthopaedic Surgeons.