We investigate on development of myoelectric
elbow prostheses with ultrasonic motor. Ultrasonic motors
have some special unique features, such as high-torque under
low-speed operation, compact size, and no electromagnetic
noise. On other hand, use of the threshold level or amplitude of
EMG (electromyogram) is often adopted as control methods of
practical myoelectric prostheses using microcomputer.
However, this method is not always suitable for the proposed
prostheses. In order to development of an EMG controller for
the myoelectric elbow prostheses, we proposed an EMG
control system using PSoC microcomputer for ultrasonic
motor. In this study, we development an EMG control system
for ultrasonic motors using PSoC microcomputer, and it was
proved effective in fundamental experiments.