A New Multi-Degree-of-Freedom Ultrasonic Motor Using a Bell Shaped Piezoelectric Vibrator
B. Keller, W. Schinköthe, Universität Stuttgart, Stuttgart, Germany
The Multi-degree-of-freedom (multi-DOF) ultrasonic motor described in this paper uses one bell shaped vibrator completely made of piezoceramic material that is fixed at its base area to provide 3-D trajectories on the top of this structure. The 3-D trajectories are generated by superposition of one horizontal and one vertical eigenmode. The vertical eigenmode causes the vibrators top to move in the vertical direction and the horizontal eigenmode causes a movement in the horizontal direction. Due to the rotation symmetry of the bell structure the horizontal eigenmode can be excited in several horizontal directions. So the superposition of these movements results in 3-D trajectories on the top of the bell. The coincidence of the resonance frequencies of one horizontal and one vertical eigenmode is the key issue that has to be incorporated by the development of such a motor. Varying the dimensions of the bell structure with the help of FEM-simulations is a method to reach a coincidence of the resonance frequencies of at least one vertical and one horizontal eigenmodes.
ACTUATOR 2014 Manuskript Poster 58
Publication date: 26/05/2015
Manuscript Poster 58 published in Conference Proceedings ACTUATOR 2014
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