Virtual Physical Coupling of Two Lower-Limb Exoskeletons
Emek Bar{\i}\c{s} K\"u\c{c}\"uktabak, Yue Wen, Matthew Short, Efe, Demirba\c{s}, Kevin Lynch, Jose Pons

TL;DR
This paper introduces a novel system enabling haptic interactions between two users wearing lower-limb exoskeletons, facilitating the study of dyadic motor learning and rehabilitation during walking.
Contribution
Developed the first platform for multi-joint dyadic haptic interactions between lower-limb exoskeletons, allowing exploration of new gait rehabilitation schemes.
Findings
Dyads showed synchronized movement with increased virtual stiffness.
The platform successfully rendered different haptic properties and connection types.
Joint angle differences decreased as virtual stiffness increased.
Abstract
Physical interaction between individuals plays an important role in human motor learning and performance during shared tasks. Using robotic devices, researchers have studied the effects of dyadic haptic interaction mostly focusing on the upper-limb. Developing infrastructure that enables physical interactions between multiple individuals' lower limbs can extend the previous work and facilitate investigation of new dyadic lower-limb rehabilitation schemes. We designed a system to render haptic interactions between two users while they walk in multi-joint lower-limb exoskeletons. Specifically, we developed an infrastructure where desired interaction torques are commanded to the individual lower-limb exoskeletons based on the users' kinematics and the properties of the virtual coupling. In this pilot study, we demonstrated the capacity of the platform to render different haptic…
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Taxonomy
TopicsStroke Rehabilitation and Recovery · Muscle activation and electromyography studies · Prosthetics and Rehabilitation Robotics
