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Description
The paper presents a constructed model of a prosthetic hand controlled by an electromyographic (EMG) signal. The hand model, along with the forearm, was printed using a 3D printer from PETG material. An Arduino Uno microcontroller was chosen as the control system for the servomechanisms, which act as the execution system. A polyester braid is responsible for transferring the movement of the servomechanisms to the fingers. The prosthesis has two power systems. The first one is responsible for the operation of the microcontroller, and the second powers the executive motors. Three surface electrodes, which are attached to the forearm with a strap, are responsible for reading the electromyographic signal. The measured signal is transmitted to an amplifier and then to the microcontroller, where signal processing and filtering occur. Based on the measurements, control signals are generated to operate the servomechanisms.
During the tests, an analysis of the recorded EMG signal was performed, and trials were conducted to control the prosthesis using the electromyographic signal. The proposed solution allows for the clenching and loosening of the hand, enabling actions such as grasping objects and offering a hand to another person. The conducted studies and tests demonstrated the possibility of using the EMG signal to control the prosthetic hand.
