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Ari Wilkenfeld

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Papers by Ari Wilkenfeld

Research paper thumbnail of Adapted speed and patient-tailored knee prosthesis

Research paper thumbnail of Controllable prosthetic joint system

Research paper thumbnail of Geschwindigkeitsangepasste und patientenangepasste knieprothese

Research paper thumbnail of Control System for Prosthetic Knee

Research paper thumbnail of Speed-adaptive and patient-adaptive prosthetic knee

Research paper thumbnail of An Auto-Adaptive External Knee Prosthesis

Research paper thumbnail of Patient-adaptive prosthetic and orthotic leg systems

Two computer-controlled devices for leg rehabilitation are presented: 1) an external knee prosthe... more Two computer-controlled devices for leg rehabilitation are presented: 1) an external knee prosthesis for trans-femoral amputees; and 2) a force-controllable ankle-foot orthosis to assist individuals suffering from drop-foot, a gait pathology resulting from muscle weakness in ankle dorsiflexors. Here muscle-like actuators and biologically-inspired control schemes are employed to enhance patient stability, speed and dynamic cosmesis. Patient-adaptive control schemes are discussed

Research paper thumbnail of User‐adaptive control of a magnetorheological prosthetic knee

Industrial Robot: An International Journal, 2003

A magnetorheological knee prosthesis is presented that automatically adapts knee damping to the g... more A magnetorheological knee prosthesis is presented that automatically adapts knee damping to the gait of the amputee using only local sensing of knee force, torque, and position. To assess the clinical effects of the user‐adaptive knee prosthesis, kinematic gait data were collected on four unilateral trans‐femoral amputees. Using the user‐adaptive knee and a conventional, non‐adaptive knee, gait kinematics were evaluated on both affected and unaffected sides. Results were compared to the kinematics of 12 age, weight and height matched normals. We find that the user‐adaptive knee successfully controls early stance damping, enabling amputee to undergo biologically‐realistic, early stance knee flexion. These results indicate that a user‐adaptive control scheme and local mechanical sensing are all that is required for amputees to walk with an increased level of biological realism compared to mechanically passive prosthetic systems.

Research paper thumbnail of Adapted speed and patient-tailored knee prosthesis

Research paper thumbnail of Controllable prosthetic joint system

Research paper thumbnail of Geschwindigkeitsangepasste und patientenangepasste knieprothese

Research paper thumbnail of Control System for Prosthetic Knee

Research paper thumbnail of Speed-adaptive and patient-adaptive prosthetic knee

Research paper thumbnail of An Auto-Adaptive External Knee Prosthesis

Research paper thumbnail of Patient-adaptive prosthetic and orthotic leg systems

Two computer-controlled devices for leg rehabilitation are presented: 1) an external knee prosthe... more Two computer-controlled devices for leg rehabilitation are presented: 1) an external knee prosthesis for trans-femoral amputees; and 2) a force-controllable ankle-foot orthosis to assist individuals suffering from drop-foot, a gait pathology resulting from muscle weakness in ankle dorsiflexors. Here muscle-like actuators and biologically-inspired control schemes are employed to enhance patient stability, speed and dynamic cosmesis. Patient-adaptive control schemes are discussed

Research paper thumbnail of User‐adaptive control of a magnetorheological prosthetic knee

Industrial Robot: An International Journal, 2003

A magnetorheological knee prosthesis is presented that automatically adapts knee damping to the g... more A magnetorheological knee prosthesis is presented that automatically adapts knee damping to the gait of the amputee using only local sensing of knee force, torque, and position. To assess the clinical effects of the user‐adaptive knee prosthesis, kinematic gait data were collected on four unilateral trans‐femoral amputees. Using the user‐adaptive knee and a conventional, non‐adaptive knee, gait kinematics were evaluated on both affected and unaffected sides. Results were compared to the kinematics of 12 age, weight and height matched normals. We find that the user‐adaptive knee successfully controls early stance damping, enabling amputee to undergo biologically‐realistic, early stance knee flexion. These results indicate that a user‐adaptive control scheme and local mechanical sensing are all that is required for amputees to walk with an increased level of biological realism compared to mechanically passive prosthetic systems.

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