Soft robotic glove for combined assistance and at-home rehabilitation

This paper presents a portable, assistive, soft robotic glove designed to augment hand rehabilitation for individuals with functional grasp pathologies. The robotic glove utilizes soft actuators consisting of molded elastomeric chambers with fiber reinforcements that induce specific bending, twisting and extending trajectories under fluid pressurization. These soft actuators were mechanically programmed to match and support the range of motion of individual fingers. They demonstrated the ability to generate significant force when pressurized and exhibited low impedance when un-actuated. To operate the soft robotic glove, a control hardware system was designed and included fluidic pressure sensors in line with the hydraulic actuators and a closed-loop controller to regulate the pressure. Demonstrations with the complete system were performed to evaluate the ability of the soft robotic glove to carry out gross and precise functional grasping. Compared to existing devices, the soft robotic glove has the potential to increase user freedom and independence through its portable waist belt pack and open palm design. Soft actuator design and fabrication that mechanically program desired motions.Hand motion study to conform and match actuators to fingers joint motions.Overall system including an open-palm glove and a portable power/control unit.Closed-loop nonlinear controller that regulates the actuator hydraulic pressure.Quantitative and qualitative evaluation of the soft robotic glove.

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