Powered Knee Orthosis for Performance of Assistance and Rehabilitation Purposes

Actuation Systems of Active Orthoses Used for Gait Rehabilitation

“…They designed an orthosis that could be widely used for patients' rehabilitation and, also, as assistive device during day-to-day activities. The use of the hybrid actuation system provides an advantage for the orthoses by replacing the compressor and hydraulic valves with an electric motor with a reducer [37].…”

“…Researchers have recourse to the use of a combined hydraulic-electric actuation system because of the high power ratio offered by the hydraulic system and the design of the electric motor that offers the possibility of forming a compact system for producing the pressure [38]. Other examples of hydraulic actuation are: [17,[37][38][39][40]. Fig.…”

Linear Series Elastic Actuator for Powered Knee Orthosis

“…• In terms of performance the device should deliver high forces and torques and it should have a high dynamic range; • In terms of compliance and backdrivability the device should not hinder smoothness of natural human actions causing interaction forces; • The device should be safe for human during interactions between user and actuator. 2 Authors consider the backdrivability and compliance of an actuator to be the key factors and the stepping stones for a prototype of an active orthosis. 3,4 In a therapy and rehabilitation these qualities influence directly comfort and safety of a patient.…”