Abstract
In this paper, we discuss the contact behavior between the stator and the lining material that sticks to the rotor of an ultrasonic motor. The ultrasonic motor is powered by the vibration of the stator and operates with a frictional force between the stator and the lining material. Therefore it is important to examine the mechanism of the contact behavior to improve the energy efficiency and durability of the ultrasonic motor. We propose a numerical technique using the finite element method on the basis of incremental theory to examine the contact behavior. Moreover, we clear the contact mechanism and the driving characteristics of the ultrasonic motor.
