As our population ages, and trends in obesity continue to grow, joint degenerative diseases like osteoarthritis (OA) are
becoming increasingly prevalent. With no cure currently in sight, the only effective treatments for OA are orthopaedic
surgery and prolonged rehabilitation, neither of which is guaranteed to succeed.
Gait retraining has tremendous potential to alter the contact forces in the joints due to walking, reducing the risk of one
developing hip and knee OA. Dielectric Elastomer Actuators (DEAs) are being explored as a potential way of applying
intuitive haptic feedback to alter a patient’s walking gait. The main challenge with the use of DEAs in this application is
producing large enough forces and strains to induce sensation when coupled to a patient’s skin.
A novel controller has been proposed to solve this issue. The controller uses simultaneous capacitive self-sensing and
actuation which will optimally apply a haptic sensation to the patient’s skin independent of variability in DEAs and
patient geometries.
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