Advancements in finger prosthesis: A design using shape memory alloy actuation mechanism
The present work discusses about the application of Shape Memory Alloy (SMA) actuation for bending prosthetic fingers using Electromyography (EMG) signals for finger amputees. While comparing with servo actuation, SMA actuators provide improved mobility, reduced bulk and greater flexibility. It eluc...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-09-01
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| Series: | Results in Engineering |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123025011259 |
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| Summary: | The present work discusses about the application of Shape Memory Alloy (SMA) actuation for bending prosthetic fingers using Electromyography (EMG) signals for finger amputees. While comparing with servo actuation, SMA actuators provide improved mobility, reduced bulk and greater flexibility. It elucidates the actuation using different configurations of the finger prototype and SMA with super-elastic wire. The super-elastic wire assists the SMA in retracting to the ideal position. The SMA wire was -trained on a cylindrical pipe and a fixture. An experimental setup for flexure at Proximal Inter Phalangeal (PIP) and Distal Inter Phalangeal (DIP) joint includes electric circuit using Arduino Uno and EMG sensor. The bending angles of the finger prosthesis achieved by the SMA trained on fixture are 48° at PIP and 61° at DIP. While it is 64° at PIP and 68° at DIP with those trained on cylindrical pipe. The bending angles with SMA and super elastic wire were 54° and 22°. The measured angles with SMA alone are comparable with biological fingers. The present work marks a significant advancement in the field of finger prosthesis, offering a promising avenue for the well-being of finger amputees. |
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| ISSN: | 2590-1230 |