Modular Pressure Redistribution Cushion with Proprioceptive Soft–Rigid Hybrid Actuator

Abstract

Pressure ulcers, which can result from prolonged sitting, pose a significant challenge for wheelchair users. Soft robotics has considerable potential in preventing pressure ulcers. However, current soft robotics, constructed from flexible materials, face limitations including insufficient proprioception and controllability. Herein, a vacuum‐powered proprioceptive soft–rigid hybrid actuator (PSHA) module and a modular pressure redistribution cushion (MPRC) developed using this module are introduced. This PSHA module is capable of detecting both position and force. Each module within the MPRC is equipped with onboard control, proprioceptive sensation, and inter‐module communication. The MPRC incorporates a closed‐loop control system, enabling it to actively redistribute pressure, thereby preventing prolonged compression of local soft tissue during periods of inactivity. The proposed PSHA module, as evidenced in its application in pressure redistribution cushions, offers a promising approach for designs intent on reducing the risk of pressure ulcers. This study significantly contributes to the advancement of assistive technology, with the potential to enhance the quality of life for individuals with immobility or limited mobility.