NDLI: A mathematical model for the start-up of an ultrasonic bar-type motor

Content Provider	IEEE Xplore Digital Library
Author	Gutschmidt, S. Hagedorn, P.
Copyright Year	2003
Description	Author affiliation: Dept. of Appl. Math., Darmstadt Univ. of Technol., Germany (Gutschmidt, S.; Hagedorn, P.)
Abstract	A simple mathematical model is presently being developed at TUD, modeling the transient behavior of an ultrasonic bar-type motor and in particular the start-up process. The model described is a further improvement on the earlier model formulated for steady state operation only. In the ultrasonic bar-type motor, stator vibrations are generated by means of piezoceramic elements. Two phase-shifted bending modes cause the upper plate of the stator to undergo a wobbling motion. The rotor is pressed against the stator and driven by frictional forces at the contact point. Both, stator and rotor here are modeled as rigid and are elastically supported. The kinematics is described taking into account all geometric nonlinearities. In modeling the start-up, special attention is given to differentiating between slip and stick contact conditions, as well as between contact and no-contact, since these conditions may change rapidly during the start-up process. These changes in the contact conditions have to be taken care of by the numerical integration procedure. Further improvements will include modeling the piezoceramic excitation in more detail. It is presently described by a rotating torque, generating the wobbling motion of the stator. Reference is also made to experimental investigations.
Sponsorship	IEEE Ind. Electron. Soc.(IES) IEEE Robotics & Autom. Soc. (RAS) ASME Dynamic Syst. & Control Div. (DSC)
Starting Page	1304
Ending Page	1308
File Size	543444
Page Count	5
File Format	PDF
ISBN	0780377591
DOI	10.1109/AIM.2003.1225531
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-07-20
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Mathematical model Stators Rotors Torque Prototypes Piezoelectric materials Steady-state Vibrations Kinematics Lenses
Content Type	Text
Resource Type	Article

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