Development of EMG-FMG Based Prosthesis With PVDF-Film Vibrational Feedback Control

• Published in: IEEE sensors journal Vol. 21; no. 20; pp. 23597 - 23607
• Main Authors: Choi, Yuna, Lee, Seulah, Sung, Minchang, Park, Junho, Kim, Sungmin, Choi, Youngjin
• Format: Journal Article
• Language: English
• Published: New York IEEE 15.10.2021; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Algorithms; Biofeedback; Capacitive sensors; Control methods; Control systems; Control theory; Data gloves; Decision trees; Electromyography; electromyography (EMG); Feedback control; Feedback loops; Feedforward control; forcemyography (FMG); Input devices; Motion perception; Performance enhancement; Piezoelectric actuators; Pins; polyvinylidene-fluoride (PVDF); Prostheses; Prosthesis; Prosthetic hand; Sensors; Sensory feedback; vibrational feedback; Vibrations
• ISSN: 1530-437X; 1558-1748
• DOI: 10.1109/JSEN.2021.3109607

The paper proposes an EMG-FMG-based prosthesis using a vibrational feedback method. The control loop for bio-feedback consists of a feed-forward loop for controlling the prosthetic hand and a sensory feedback loop for delivering the sense of vibration according to the distance with an object. In addition, the motion of the prosthetic hand using the EMG-FMG knit band sensor as an input device is generated via a decision tree algorithm, the distance is measured using a capacitive knit data glove, and the vibrational feedback using a PVDF piezoelectric actuator is provided. The control loop for bio-feedback was verified experimentally. First, the performance of the sensors and control methods was analyzed, and the results of EMG-FMG motion recognition and vibrational feedback were verified. Second, the experiment was conducted on ten subjects who wore prosthesis to which the bio-feedback method was applied. Thanks to the control loops for bio-feedback, the grasping time with blindfolded was reduced by 2.92 seconds and the number of failures decreased by 1.04 times. As a result, it was confirmed that the control loop for bio-feedback could improve the performance of the prosthesis.