A powered ankle-foot orthoses for ankle rehabilitation

Ankle rehabilitation training becomes a tough question for the patients with ankle joint injuries especially with the hemiplegia after stroke. Here a novel powered ankle-foot orthoses which can provide ankle dorsiflexion and plantar flexion assistant using electric motor is proposed in this paper. The mechanical structure of the orthoses including wearing parts, ankle joint hinged part, driving unit, transmission mechanism and sensing units is mainly described. In order to obtain the ankle's moment-angle relationship, the dynamics model of the ankle-foot is established. In addition, for the motor control of ankle-foot orthoses, motion path is planned based on the human walking gait and the simulation. This study provides a new method for ankle-foot orthoses design and has great significance for ankle rehabilitation.

[1]  Sunil K. Agrawal,et al.  Design of a Novel Two Degree-of-Freedom Ankle-Foot Orthosis , 2007 .

[2]  Mao Yurong.  Effects of ankle-foot orthosis (AFO) on trunk motion and walking capacity of hemiplegic stroke patients , 2010 .

[3]  Daniel P Ferris,et al.  An improved powered ankle-foot orthosis using proportional myoelectric control. , 2006, Gait & posture.

[4]  Daniel P Ferris,et al.  Locomotor adaptation to a powered ankle-foot orthosis depends on control method , 2007, Journal of NeuroEngineering and Rehabilitation.

[5]  Hugh M. Herr,et al.  New horizons for orthotic and prosthetic technology: artificial muscle for ambulation , 2004, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[6]  Jian S. Dai,et al.  Sprained Ankle Physiotherapy Based Mechanism Synthesis and Stiffness Analysis of a Robotic Rehabilitation Device , 2004, Auton. Robots.

[7]  C. T. Farley,et al.  Mechanism of leg stiffness adjustment for hopping on surfaces of different stiffnesses. , 1998, Journal of applied physiology.

[8]  Eric Loth,et al.  A pneumatic power harvesting ankle-foot orthosis to prevent foot-drop , 2009, Journal of NeuroEngineering and Rehabilitation.

[9]  Daniel P. Ferris,et al.  Mechanical performance of artificial pneumatic muscles to power an ankle-foot orthosis. , 2006, Journal of biomechanics.

[10]  Daniel P Ferris,et al.  Neuromechanical adaptation to hopping with an elastic ankle-foot orthosis. , 2006, Journal of applied physiology.

[11]  H. Herr,et al.  Adaptive control of a variable-impedance ankle-foot orthosis to assist drop-foot gait , 2004, IEEE Transactions on Neural Systems and Rehabilitation Engineering.

[12]  M. Noel,et al.  An ElectroHydraulic Actuated Ankle Foot Orthosis to Generate Force Fields and to Test Proprioceptive Reflexes During Human Walking , 2008, IEEE Transactions on Neural Systems and Rehabilitation Engineering.

[13]  G. G. Stokes.  "J." , 1890, The New Yale Book of Quotations.

[14]  R. Nakamura,et al.  Relationship between stride length and walking rate in gait training for hemiparetic stroke patients. , 1999, American journal of physical medicine & rehabilitation.

[15]  John D. Enderle,et al.  Introduction to Biomedical Engineering , 1999 .

[16]  Laurent J Bouyer,et al.  Journal of Neuroengineering and Rehabilitation Open Access Using an Electrohydraulic Ankle Foot Orthosis to Study Modifications in Feedforward Control during Locomotor Adaptation to Force Fields Applied in Stance , 2009 .