A Soft Exosuit for Flexible Upper-Extremity Rehabilitation

Area of Science:

• Robotics
• Biomedical Engineering
• Rehabilitation Technology

Background:

• Upper-extremity impairment affects daily life for stroke survivors and others.
• Physical therapy aims to restore arm function by improving body perception and strength.
• Wearable robots like exoskeletons can aid in rehabilitation, but often lack flexibility.

Purpose of the Study:

• To introduce the Compliant Robotic Upper-extremity eXosuit (CRUX).
• To address the limitations of rigid exoskeletons by creating a compliant and portable solution.
• To evaluate the efficacy of CRUX's design, control system, and impact on exercise.

Main Methods:

• Designed CRUX using a modified tensegrity structure along lines of minimal-extension.
• Developed a mimetic control algorithm for the exosuit.
• Conducted three studies to assess CRUX's controller, flexibility, compliance, and metabolic cost reduction.

Main Results:

• Demonstrated the efficacy of CRUX's mimetic controller.
• Validated CRUX's flexibility and compliance for natural body movement.
• Showed a reduction in metabolic cost when users exercised with CRUX assistance.

Conclusions:

• CRUX is a compliant, lightweight, and portable exosuit for augmenting upper-extremity function.
• The technology shows promise for physical therapy and rehabilitation outside clinical settings.
• Future work will explore further use cases and advancements in exosuit technology.