Chen Zhijiang, Li Xiaotian, Ci Penghong, Liu Guoxi, Dong Shuxiang
Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China.
Rev Sci Instrum. 2015 Mar;86(3):035002. doi: 10.1063/1.4914843.
A novel standing wave linear ultrasonic motor operating in in-plane expanding and bending modes was proposed in this study. The stator (or actuator) of the linear motor was made of a simple single Lead Zirconate Titanate (PZT) ceramic square plate (15 × 15 × 2 mm(3)) with a circular hole (D = 6.7 mm) in the center. The geometric parameters of the stator were computed with the finite element analysis to produce in-plane bi-mode standing wave vibration. The calculated results predicted that a driving tip attached at midpoint of one edge of the stator can produce two orthogonal, approximate straight-line trajectories, which can be used to move a slider in linear motion via frictional forces in forward or reverse direction. The investigations showed that the proposed linear motor can produce a six times higher power density than that of a previously reported square plate motor.
本研究提出了一种新型的驻波线性超声电机，其工作在面内扩张和弯曲模式。线性电机的定子（或致动器）由一块简单的单锆钛酸铅（PZT）陶瓷方板（15×15×2 mm³）制成，中心有一个圆孔（D = 6.7 mm）。通过有限元分析计算定子的几何参数，以产生面内双模驻波振动。计算结果预测，附着在定子一条边中点的驱动尖端可产生两条正交的近似直线轨迹，可通过摩擦力使滑块在向前或向后方向上做直线运动。研究表明，所提出的线性电机能产生比先前报道的方板电机高六倍的功率密度。
