Multimodal sensor controlled three Degree of Freedom transradial prosthesis

Area of Science:

• Biomedical Engineering
• Rehabilitation Engineering
• Prosthetics

Background:

• Conventional myoelectric prostheses often require significant mental effort for control.
• Existing prosthetic systems can lead to compensatory movements, affecting user experience and function.

Purpose of the Study:

• To develop a multimodal sensor control system for 3-Degree-of-Freedom transradial prostheses.
• To reduce the cognitive load associated with operating multiple prosthetic joints.
• To minimize compensatory motions often seen with traditional myoelectric prostheses.

Main Methods:

• Utilized an accelerometer within the prosthesis socket to compute gravitational force angles.
• Implemented threshold On/Off control triggered by co-contraction EMG signals.
• Drove pronation/supination and palmar/dorsiflexion joints using sensor data.

Main Results:

• The developed controller demonstrated potential in reducing compensatory shoulder movements during pick-raise-place tasks.
• Performance was compared favorably against conventional locked-wrist prostheses in able-bodied subjects.
• The system showed promise in enhancing functional control for transradial amputees.

Conclusions:

• The multimodal sensor control system offers a viable approach to improving transradial prosthesis functionality.
• Further modifications are necessary to ensure system stability and optimal performance.
• This technology has the potential to enhance the quality of life for prosthesis users.