Design and Transparency Assessment of a Gait Rehabilitation Robot With Biomimetic Knee Joints
Jamwal P.K. Dauletbayev S. Sagidoldin D. Keikibayev D. Niyetkaliyev A. Hussain S. Agrawal S.K.
2025Institute of Electrical and Electronics Engineers Inc.
IEEE Transactions on Medical Robotics and Bionics
2025#7Issue 1290 - 302 pp.
Robotic exoskeletons are being increasingly used in clinics for the treatment of medicable disabilities. These exoskeletons, which closely couple with patients’ limbs, need to move in harmony with the endoskeleton motions. To achieve coordination, exoskeletons should be transparent; in other words, they should not interfere with natural human motion or their underlying coordination strategies. Transparency can be achieved through a bio-inspired exoskeleton design and also by implementing appropriate force control methods to maneuver exoskeleton motions. A new hybrid active-passive Gait Exoskeleton-Assisted Rehabilitation (GEAR) robot is presented here for the rehabilitation of lower limb disabilities. The GEAR robot is designed to enhance transparency incorporating a flexible hip joint and a biomimetic knee joint. The proposed GEAR robot also integrates a Remote Centered Motion (RCM) based passive mechanism to support torso and pelvic motions in two planes and features actuated exoskeleton legs in the sagittal plane for treadmill-assisted walking. The exoskeleton legs are actuated at their hip and knee joints using backdrivable actuators. To provide a natural walking experience, the hip joints of the exoskeleton legs offer two passive degrees of freedom in the frontal and transverse planes in addition to the actuated sagittal plane motion. The biomimetic design of the exoskeleton knee joint ensures alignment with the human anatomical knee joint by closely tracking the latter’s instantaneous center of rotation (ICR). To evaluate GEAR robot’s transparency, a comparative study was conducted, involving three healthy subjects. The participants walked freely on a treadmill and then with the GEAR robot operated first in a completely backdrivable (i.e., passive) mode and subsequently in an active mode. The sEMG data collected during these experiments were analyzed to assess robot’s transparency.
and self-alignment , gait exoskeleton assisted rehabilitation (GEAR) , Gait rehabilitation , natural walking , robot transparency
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Nazarbayev University, School of Engineering and Digital Sciences, Astana, 010000, Kazakhstan
Nazarbayev University, Robotics and Artificial Intelligence LLP, Astana, 010000, Kazakhstan
University of Canberra, School of Information Technology and Systems, Canberra, 2601, ACT, Australia
Columbia University, Department of Mechanical Engineering, New York, 10027, NY, United States
Columbia University Medical Center, Department of Rehabilitation and Regenerative Medicine, New York, 10032, NY, United States
Nazarbayev University
Nazarbayev University
University of Canberra
Columbia University
Columbia University Medical Center
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