STUDY ON THE CONTACT MODEL OF ULTRASONIC MOTOR CONSIDERING SHEARING DEFORMATION

Li Huafeng - Zhao Chunsheng - Gu Chenglin

   The interface contact model between the stator and rotor of a travelling wave type ultrasonic motor is presented, assuming that the rigid stator contacts the flexible rotor over an area, and the frictional material is regarded as a distributed linear spring and without shearing deformation from which the mechanical characteristic of the motor and the interface transmission efficiency are deduced. On this basis, the interface contact model taking account the shearing deformation of the frictional material, which better agrees with the practical situation, is proposed. Then the influences of the motor's parameters on its performance are investigated. The effectiveness of the proposed model is validated by other researchers.

Keywords: ultrasonic motor, contact model

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