Flexible acoustic fiber ultrasound motor modeling using impedance and transmission matrices

The four-port matrix modeling is here applied to the power transfer mechanism through the different sections of the acoustic fiber motor, in order to evaluate the performances of the design. Analytical results are compared with experimental measurements on a motor prototype (fiber length 115 mm and diameter 0.8 mm, maximum torque 1.4 mNm, maximum speed 3200 rpm), showing a good agreement.