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Abstract: First the definition of flexible rotor of traveling wave type rotary ultrasonic motor (TRUM) is given. It is pointed out that the flexible rotor can be classified in the range of elastic annular plate with large overall motion. And the kinematical equation of flexible rotor is derived. Then the rigid-flexible coupling dynamic model of flexible rotor is obtained by Lagrange equation. So the complete model of TRUM is derived by the integration of the contact model based on flexible rotor, stator’s semi-analytical model and flexible rotor model. The analysis examples show that the complicated contact mechanism with asymmetry occurs at the interface between the stator and flexible rotor. The analyses explain how the appropriate damp of rotor can lead to the good performance of motor. Moreover the proper flexible rotor is proved to improve the motor’s output efficiency by decrease of the friction in the radial direction at the interface. Finally the results of simulation are found to be in good agreement with those of experiments, so the proposed model provides the theoretical foundation for the design of the flexible rotor.
Key words: Flexible rotor Traveling wave type rotary ultrasonic motor Sliding in the radial direction Rigid-flexible coupling
CLC No:
TM356
国家自然科学基金(10604032)和江苏省高科技计划(DG2006005)资助项目.
Received
20070317,
received
in
revised
form
20071127
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| References
[1] LIONEL P, PAUL G. Industrial design of a centimetric “TWILA”
ultrasonic motor[J]. Sensors and Actuators A: Physical, 2005,
120(1): 211-224.
[2]
ZHAO Chunsheng. Some proposals for development of ultrasonic motor
techniques in China[C]//The 3rd Proceed-ings of Ultrasonic Motor Theory
and Application Technol-ogy, China, Hangzhou. Hangzhou: Zhejiang
University, 2005: 12-14.
[3]
SUN Fengyan, TIAN Xiu, QU Jianjun. Performance simu-lation of traveling
wave ultrasonic motor based on visco-elastic contact model[J]. Chinese
Journal of Me-chanical Engineering, 2006, 42(Supp.): 125-134.
[4] PONS J L, RODRIGUEZ H, FERNANDEZ J F, et al. Pa-rametrical
optimization of ultrasonic motors[J]. Sensors and Actuators
A: 2003,107(2): 169-182.
[5] HYUN-PHILL K, SANGSIG K, JIN-SANG K, et al. Wear and dynamic
properties of piezoelectric ultrasonic motor with frictional materials
coated stator[J]. Materials Chemistry and Physics, 2005,
90(2-3): 391-395.
[6] HAGOOD N W, ANDREW J M. Modeling of a piezo-electric rotary
ultrasonic motor[J]. IEEE Trans. Ultrason. Ferroelectr. Freq. Control,
1995, 42(2): 210-224.
[7] HAGEDORN P, SATTEL T, SPEZIARI D, et al. The importance of rotor
flexibility in ultrasonic traveling wave motors[J]. Smart Mater. Struc.,
1998, 7: 352-368.
[8]
DONG Yinghui, LI Zhirong, ZHAO Chunsheng. Optimal design of the rotor
and stator of a miniature bar-type ul-trasonic motor[J]. Journal of
Vibration Measurement & Diagnosis, 2002, 22(3): 175-178.
[9]
CHEN Chao, ZHAO Chunsheng. Modeling of the stator of the traveling wave
rotary ultrasonic motor based on substructural modal synthesis method[J].
Journal of Vibra-tion Engineering, 2005, 18(2): 133-137.
[10]
HONG Jiazhen. Dynamics of multibody systems[M]. Beijing: Higher Education
Press, 1999.
[11]
YUAN Zihuai, QIAN Xingfang. Control flight mechanics and computer
simulation[M]. Beijing: National Defence Industry Press, 2001.
[12]
SUN Shiji, HUANG Chengxu. Rigid and elastic dy-namic analysis of
mechanical system[M]. Beijing: China Communications Press, 2000.
[13] NORDDIN E G. Hybrid modeling of a traveling wave piezoelectric
motor[D]. Denmark: Aalborg University, 2000.
[14]
CHEN Chao, ZHAO Chunsheng. Modeling of stator of a traveling wave rotary
ultrasonic motor based on semi-analytical method[J]. China Mechanical
Engineering, 2005, 16(21): 1 940-1 944.
|