Bumbard, K.B.; Herrington, H.; Goh, C.-H.; Ibrahim, A. Incorporation of Torsion Springs in a Knee Exoskeleton for Stance Phase Correction of Crouch Gait. Appl. Sci.2022, 12, 7034.
Bumbard, K.B.; Herrington, H.; Goh, C.-H.; Ibrahim, A. Incorporation of Torsion Springs in a Knee Exoskeleton for Stance Phase Correction of Crouch Gait. Appl. Sci. 2022, 12, 7034.
Bumbard, K.B.; Herrington, H.; Goh, C.-H.; Ibrahim, A. Incorporation of Torsion Springs in a Knee Exoskeleton for Stance Phase Correction of Crouch Gait. Appl. Sci.2022, 12, 7034.
Bumbard, K.B.; Herrington, H.; Goh, C.-H.; Ibrahim, A. Incorporation of Torsion Springs in a Knee Exoskeleton for Stance Phase Correction of Crouch Gait. Appl. Sci. 2022, 12, 7034.
Abstract
Crouch gait is a motor complication commonly associated with cerebral palsy, spastic diplegia, stroke, and motor-neurological pathologies, broadly defined as knee flexion in excess of 20° in the gait cycle. Uncorrected crouch gait results in fatigue, joint degradation, and loss of ambulation. Torsion springs have been used in cycling to store energy in knee flexion to reduce fatigue in the quadriceps during knee extension. SolidWorks was used to design a passive exoskeleton for the knee, incorporating torsion springs of stiffnesses 20,000 N/mm and 30,000 N/mm at the knee joint to correct four different crouch gaits. OpenSim was used to gather data from moments produced and knee angles from each crouch gait and the normal gait. Motion analysis of the exoskeleton was simulated using knee angles for each crouch gait and compared with moments produced with the normal gait moments in the stance phase of the gait cycle. All crouch gait moments were significantly reduced, and the correction of peak crouch moments was achieved corresponding to the normal gait cycle during the stance phase. These results offer significant potential for nonsurgical and less invasive options for wearable exoskeletons in crouch gait correction.
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
