Systematic experimental based modeling of a rotary piezoelectric ultrasonic motor.

In this paper, a new method for equivalent circuit modeling of a traveling wave ultrasonic motor is presented. The free stator of the motor is modeled by an equivalent circuit containing complex circuit elements. A systematic approach for identifying the elements of the equivalent circuit is suggested. The Levenberg-Marquardt parameter estimation algorithm is used to model the alteration of the admittance after placing the rotor on the stator. Thereafter, theoretical assessments and experimental measurements are used to account for the speed reduction that is caused by placing the rotor on the stator and applying the load torque. Finally, the effects of temperature changes and the resultant response of the motor are computed. Results of the experiments and measurements are used to verify and validate the precision of the new modeling method.

[1]  Dong Sun,et al.  Modeling and performance evaluation of traveling-wave piezoelectric ultrasonic motors with analytical method☆ , 2002 .

[2]  J.L. Pons,et al.  Novel modeling technique for the stator of traveling wave ultrasonic motors , 2003, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[3]  R. Holland,et al.  Representation of Dielectric, Elastic, and Piezoelectric Losses by Complex Coefficients , 1967, IEEE Transactions on Sonics and Ultrasonics.

[4]  Peter Hagedorn,et al.  TRAVELLING WAVE ULTRASONIC MOTORS, PART I: WORKING PRINCIPLE .AND MATHEMATICAL MODELLING OF THE STATOR , 1992 .

[5]  Manabu Aoyagi,et al.  Simplified equivalent circuit of an ultrasonic motor and its applications , 1996 .

[6]  H. D. Wiederick,et al.  Accurate evaluation of the real and imaginary material constants for a piezoelectric resonator in the radial mode , 1991 .

[7]  B. Auld,et al.  Acoustic fields and waves in solids , 1973 .

[8]  K. Uchino,et al.  Accurate determination of complex materials coefficients of piezoelectric resonators , 2003, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[9]  A. Miyake,et al.  Finite-element analysis of the rotor/stator contact in a ring-type ultrasonic motor , 1992, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[10]  Yasumasa Kyodo.  Control analysis of ultrasonic motor-equivalent circuit and mechanical internal resistance , 2002, IEEE/RSJ International Conference on Intelligent Robots and Systems.

[11]  A Corigliano,et al.  Finite element modelling of a rotating piezoelectric ultrasonic motor. , 2005, Ultrasonics.

[12]  J. Poshtan,et al.  Free Stator Modeling of a Traveling Wave Ultrasonic Motor , 2005, Proceedings of the 2005 IEEE International Symposium on, Mediterrean Conference on Control and Automation Intelligent Control, 2005..

[13]  Toshiiku Sashida,et al.  An Introduction to Ultrasonic Motors , 1994 .

[14]  Erian A. Armanios,et al.  Analysis of composite structures , 2002 .

[15]  N.W. Hagood,et al.  Modeling of a piezoelectric rotary ultrasonic motor , 1995, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[16]  Horst Stöcker,et al.  Handbook of physics , 2002 .

[17]  J. G. Smits,et al.  Iterative Method for Accurate Determination of the Real and Imaginary Parts of the Materials Coefficients of Piezoelectric Ceramics , 1976, IEEE Transactions on Sonics and Ultrasonics.

[18]  Kenji Uchino.  Piezoelectric ultrasonic motors: overview , 1998 .

[19]  R.W.B. Stephens,et al.  IEEE ultrasonics symposium , 1972 .

[20]  Stewart Sherrit,et al.  PdP135. Nun-iterative evaluation of the real and imaginary material constants of piezoelectric resonators , 1992 .