Smart Mater. Struct. 7 Piezoelectric ultrasonic motors: overview
K Uchino Figure 6. Torsional coupler ultrasonic motor (a) and the motion of the torsional coupler (b). Figure 7. ‘Windmill’ motor with a disk-shaped torsional coupler. Figure 8. Piezoelectric cylinder torsional vibrator (a) and the electrode pattern (b). ...