1) Introduction2) Issues - Mechatronics system for rehabilitation devices of knee problem - Types of AKROD - Structure design considerations - Advantages of AKROD3) Conclusion4) References
• Osteoarthritis affects elderly people in most cases, and will be a major concern in the future.• Treatments of knee injuries will require proper resting and reducing the pressure acting on the knee joint.• The use of a robotic device is to improve neuromuscular control as well as a treatment to knee problems.• AKROD stands for Active Knee Rehabilitation Orthotic Device
• Northeastern University’s Active Knee Rehabilitation Device (AKROD) is one of the institutions that carried out assistive devices to aid the human limbs.• Designed for post-stroke individuals, who have regained a certain level of motor control but not yet fully attained normal walking capabilities.• AKROD functions by providing active assistance to the patient’s lower limbs.• The proposed system allows for the normal movement of the knee and allows the patient to incorporate techniques to prevent hyperextension.
1 2 RobokneeBrushless DC Motor Based AKROD 4 Electro -rheological Fluid (ERF) based Knee Rehabilitation Device 3 using variable controlled resistance Gear Bearing Drive based AKROD
• Three standard components were incorporated into the structure to ensure proper functioning of the device and better suitability for wearing onto the limb.• The coupling, being flexible for lateral adjustments, was to allow adjustments at the thigh of the user to and firmer attachment onto the limb.• The needle roller bearings is to reduce friction between these two contacting surfaces.• Both the encoder side and motor side were assembled and combined with the footpad which functions as an effective ground contact loading over a gait movement.
Advantages of AKRODCapable of aiding the knee by reducing the kneestress without affecting the mobility of the user. Helps people with weak lower extremitymuscle and muscle diseases to walkand climb stairs more easily.Patient save time and costrequired to visit the hospital.Patient exercises and improvementscan be monitored regularly by the therapist.Increased motivation for the patients to exerciseat home even without direct medical supervision.
ConclusionAKROD is useful because it providesvariable damping at the knee jointsand accelerates the recovery of kneeinjury patients.This device could be an important toolfor the rehabilitation specialist to testlower extremity strength.The initial results from human testingindicate that the AKROD is able toaccurately produce desired torqueand velocity while providing adesirable level of comfort for theperson wearing the device.
References1. http://ieeexplore.ieee.org Jason Nikitczuk, Brian Weinberg, Paul K. Canavan, and Constantinos Mavroidis Active Knee Rehabilitation Orthotic Device WithVariable Damping Characteristics Implemented via an Electrorheological Fluid IEEE/ASME TRANSACTIONS ON MECHATRONICS, VOL. 15, NO. 6, DECEMBER 2010.2. http://iris.lib.neu.eduVishal Jain (Northeastern University) Design and control of active knee rehabilitation orthotic device (AKROD) January 01, 20093. http://www.biomedcentral.com Jason Nikitczuk, Brian Weinberg, Gil Danaher, Katherine Jensen, Philip Pelletier, Jennifer Prugnarola, Ryan Stuart, Roberto Arango, Matt Leahey, Robert Pavone, Andrew Provo and Dan Yasevac Journal of NeuroEngineering and Rehabilitation 12 July 2005