J. Phys. IV France 08 (1998) Pr9-175-Pr9-178
An ultrasonic motor with an integrated position sensorF. Trigui1, J.J. Bezard2, J. Oksman1 and Y. Tanguy1
1 Service des Mesures, Supélec, Plateau du Moulon, 91192 Gif-sur-Yvette cedex, France
2 Magneti Marelli, 19 rue Lavoisier, 92002 Nanterre, France
This paper presents a method of measurement of the angular position of a traveling wave type ultrasonic motor (TWUM). This method uses the mechanical vibrations on the rotor to estimate its position. The working principle and the mathematical modeling of this kind of motors are reviewed and the position measurement system is described. Then the results of basic experiments are discussed. The obtained position and the measured one proved to be in good agreement.
© EDP Sciences 1998