Method for controlling a limb of a virtual avatar by means of the myoelectric activities of a limb of an individual and system thereof

A method for controlling a limb of a virtual avatar by the myoelectric activities of a limb of a subject, comprising a first calibration step comprising:

• acquiring first and second raw calibration myoelectric activity signals by a device for measuring myoelectric activity signals, the first and second raw calibration myoelectric activity signals resulting from contractions of variable intensities of first and second antagonistic muscles of the limb of the subject respectively, during a given period, and then:
• determining the envelope of each of the first and second signals by a processing device,
• determining the minimum and maximum myoelectric activities from the envelope of each of the first and second signals by the processing device, then, for each of the two antagonistic muscles
• determining a myoelectric activity threshold by the processing device,
• normalizing the maximum myoelectric activity and the myoelectric activity threshold by the processing device,
• determining a coefficient of conversion of the normalized myoelectric activity into a component of speed of movement of a limb of the virtual avatar by the processing device, and
• the method for controlling comprising a second step of moving the limb of the virtual avatar comprising:
• acquiring first and second raw myoelectric activity signal by the device for measuring myoelectric activity signals, the first and second raw myoelectric activity signals resulting from contractions of the two antagonistic muscles of the limb of the subject, during a given period, and then, for each of the first and second raw myoelectric activity signals:
• normalizing the myoelectric activity resulting from the signal by the processing device,
• converting the normalized myoelectric activity into a component of speed of movement of a limb of a virtual avatar by applying the coefficient of conversion by the processing device,
• determining a speed and a direction of movement of the limb of the virtual avatar by subtracting the movement speed components obtained for each of the muscles by the processing device, and
• moving the limb of the virtual avatar with the speed and direction of movement determined by the processing device.