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Abstract: Focused
on the bonding of the piezoelectric ceramic of traveling wave type
ultrasonic motors (TWUSM), the effects of the material characteristics
and the thickness of the adhesive layer on the vibrating performances of
the stator are studied based on the electromechanical coupling finite
element model of the stator, and the resisting-shear and vibrating
performances of the adhesive layer under different excitating conditions
are detailedly analyzed. The methods of improving the bonding quality of
the piezoelectric ceramic are presented, and the bonding process and the
optimum design of the TWUSM stator are determined at last. It is shown
that the thickness of the adhesive layer has little effect on the stator
frequency, but great effect on the stator vibration characteristics, and
on the premise of enough bond strength, reducing the thickness of the
adhesive layer can improve the performance of the TWUSM. Based on the
bonding process and optimum design, the 80 mm TWUSM prototype has a good
performance that the maximum torque is 1.2 N·m and the no-load
rotational speed is 80 r/min. The researching results contribute to the
industrialization of USM.
Key words: Traveling
wave ultrasonic motor(TWUSM) Adhesive layer Vibration
performances Finite element model
CLC No: TM356
国家自然科学基金(60575059), 国家863计划(2003AA742014), 浙江省重点科技计划(2004C21917)和浙江省教育厅重点(G20040103)资助项目.
Received
20051203, received in revised form 20060426 |