Yin Zhen, Dai Chenwei, Cao Ziyang, Li Wei, Chen Zhenzhen, Li Chuang
College of Mechanical Engineering, Suzhou University of Science and Technology, Suzhou 215009, PR China; Suzhou Changfeng Avionics Co., Ltd., AVIC, Suzhou 215151, PR China.
College of Mechanical Engineering, Suzhou University of Science and Technology, Suzhou 215009, PR China.
Ultrasonics. 2020 Dec;108:106216. doi: 10.1016/j.ultras.2020.106216. Epub 2020 Jun 29.
A single-mode linear ultrasonic motor was developed in this study. On the stator, a group of four pieces of piezoelectric ceramics PZT8 were utilized to generate the ultrasonic vibration. A specially designed modal conversion horn with an oblique beam was applied to transfer the longitudinal vibration to an additional bending vibration. Modal analysis was conducted by finite element method to illustrate the elliptical vibration process. Then the output performance (e.g. output thrust and output velocity) of the motor was evaluated via a series of experiments. The results show that the simulated amplitudes of longitudinal vibration and bending vibration are 9.6 μm and 3.4 μm, respectively, which match well with the tested results. The output thrust increases with the increase of voltage. The largest output thrust is 10 N at the voltage of 600 V, and the biggest output velocity is 200 mm/s at the supplied frequency of 19.8 kHz and the driving angle of 45°. The output velocity also decreases with the increase of applied load.
本研究开发了一种单模线性超声电机。在定子上，利用一组四块压电陶瓷PZT8产生超声振动。应用了一种专门设计的带有斜梁的模态转换变幅杆，将纵向振动转换为附加弯曲振动。通过有限元方法进行模态分析，以说明椭圆振动过程。然后通过一系列实验评估了电机的输出性能（如输出推力和输出速度）。结果表明，纵向振动和弯曲振动的模拟振幅分别为9.6μm和3.4μm，与测试结果吻合良好。输出推力随电压的增加而增加。在600V电压下，最大输出推力为10N，在19.8kHz的供电频率和45°的驱动角度下，最大输出速度为200mm/s。输出速度也随施加负载的增加而降低。
