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.
Frangi
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Dipartimento di Ingegneria Strutturale, Politecnico di Milano, P.za. L. da Vinci 32, 20133 Milano, Italy. attilio.frangi@polimi.it
Corigliano
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Binci
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Faure
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D008433:Mathematics; D008962:Models, Theoretical; D012399:Rotation; D014465:Ultrasonics