Finite element modelling of a rotating piezoelectric ultrasonic motor.
The evaluation of the performance of ultrasonic motors as a function of input parameters such as the driving frequency, voltage input and pre-load on the rotor is of key importance to their development and is here addressed by means of a finite element three-dimensional model. First the stator is simulated as a fully deformable elastic body and the travelling wave dynamics is accurately reproduced; secondly the interaction through contact between the stator and the rotor is accounted for by assuming that the rotor behaves as a rigid surface. Numerical results for the whole motor are finally compared to available experimental data.
Dipartimento di Ingegneria Strutturale, Politecnico di Milano, P.za. L. da Vinci 32, 20133 Milano, Italy. attilio.frangi@polimi.it
A
A
Frangi
A
A
Corigliano
M
M
Binci
P
P
Faure
D008433:Mathematics; D008962:Models, Theoretical; D012399:Rotation; D014465:Ultrasonics