Department of Mechanical Engineering, National University of Singapore, Singapore.
Ultrasonics. 2013 Jul;53(5):928-34. doi: 10.1016/j.ultras.2012.10.016. Epub 2013 Jan 8.
The purpose of this research is to present a new design of standing-wave ultrasonic motor. This motor uses three piezoelectric actuating blocks which deform appropriately when powered up. The deformations of the blocks in ultrasonic range are internally amplified via the design of the motor by about 80 times and collectively yield an elliptical trajectory for the driving head of the motor. Finite Element Analysis using ANSYS was performed for both dynamic analysis and optimization of a prototype motor. The numerical results verified that at steady state, the motor can achieve vibrations in micro-meter level and the velocity can reach decimeter scale, satisfying the fast speed requirement as a positioning actuator.
本研究旨在提出一种新型驻波超声电机设计。该电机使用三个在通电时会适当变形的压电致动块。通过电机的设计，块在超声范围内的变形在内部放大约 80 倍，并共同产生电机驱动头的椭圆形轨迹。使用 ANSYS 进行有限元分析，对原型电机进行动态分析和优化。数值结果验证了在稳态下，电机可以实现微米级别的振动，速度可以达到分米级，满足作为定位执行器的快速速度要求。
