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Intelligent multifunction myoelectric control of hand prostheses
C M Light1, P H Chappell, B Hudgins
1Electronics and Computer Science, University of Southampton, Highfield, Southampton SO17 1BJ, UK.
Journal of Medical Engineering & Technology
|October 25, 2002
Summary
This study introduces a hybrid controller for myoelectric prostheses, enabling intuitive control of a six-degree-of-freedom hand. This system automates grasping, reducing the need for visual feedback and improving prosthesis functionality.
Area of Science:
- Biomedical Engineering
- Robotics
- Neuroprosthetics
Background:
- Myoelectric prostheses lack proprioceptive feedback, necessitating visual monitoring for grip control.
- Current prostheses often have limited functionality (e.g., pincer motion), hindering object manipulation.
- Multi-axis hands increase functionality but can also increase user cognitive load.
Purpose of the Study:
- To develop a hybrid controller for intuitive myoelectric prosthesis control.
- To enable direct initiation of various prehensile functions via myoelectric signals.
- To reduce reliance on visual feedback during prosthesis use.
Main Methods:
- Development of a hybrid control system integrating user myoelectric signals.
- Implementation of a digital signal processor (DSP) for grip pressure regulation.
- Utilizing a novel six-degree-of-freedom prosthetic hand.
Main Results:
- The hybrid controller allows direct initiation of diverse prehensile functions.
- The DSP effectively regulates grip pressure, ensuring secure object prehension.
- Users can achieve stable grasping without continuous visual monitoring.
Conclusions:
- The developed hybrid controller enhances intuitive myoelectric prosthesis control.
- The six-degree-of-freedom hand with DSP regulation improves prosthetic functionality and usability.
- This approach reduces cognitive burden and reliance on visual feedback for prosthesis users.