Overview
A lightweight, wearable Continuous Passive Motion (CPM) actuator utilizing a twisted string mechanism and pulley system for elbow rehabilitation.
Key Highlights
- Problem: Existing CPM devices are bulky and heavy, requiring patients to visit hospitals for rehabilitation.
- Mechanism: Developed a circular, wearable CPM utilizing a twisted string mechanism to transmit power. Resolved the resulting Range of Motion (ROM) limitations by designing and integrating a custom Pulley System.
- Performance: Achieved an output force exceeding 60N, well above the 32.6N required to move an adult male’s forearm at a constant velocity.
- Validation: Mathematical modeling and empirical testing confirmed that the mechanism maintains linearity when string contraction is kept under 33%, demonstrating its viability for practical, high-load rehabilitation tasks.
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*Note: This research was conducted and originally published under the name Joonseo Kim.*