作　　者： ; ; ;

机构地区： 南京航空航天大学航空宇航学院精密驱动研究所

出　　处： 《湖南大学学报（自然科学版）》 2008年第12期27-31,41,共6页

摘　　要： 提出了一个单振子激励的面内行波旋转超声电机原理.该电机具有一个连接一个杆形振子的圆环形定子和两个锥形转子,锥形转子由预压力机构压在定子圆环的内边缘.杆形振子为夹心式结构,两组压电陶瓷固定在其中.一组用于激励杆的纵向振动;另一组用于激励杆的弯曲振动.有限元仿真表明:在杆的纵向振动和弯曲振动共同作用下,定子环上形成了面内行波.利用这个原理制作的样机具有如下性能:空载转速36 r/min,堵转力矩0.25 N.m,起动时间2.53 ms,关断时间3.48 ms.该型电机的定子利用了一个振子激发定子环面内行波,结构简单、紧凑,可望用于机器人关节和一些姿态调整机构的驱动. An in-plane traveling wave rotary ultrasonic motor with a single-vibrator was proposed. The mo- tor is composed of an annular stator with a bar vibrator and two cone shaped rotors. The rotors were pressed in contact to the borders of the inner surface of the stator by means of an opportune pre-pressure system. The bar vibrator has a sandwich-like configuration. Two set piezoelectric elements were bolded in it. One is used to ex- cite the longitudinal vibration, and the other is used to excite the flexural vibration of the bar. The effective ex- citation of the in-plane traveling wave in the stator, with the longitudinal vibration and the bending vibration in the bar vibrator, has been simulated with FEM （finite element method）. The performance characteristics achieved by the prototype are： the rotary speed without load 36 r/min, the stall torque 0.25 N·m, the start-up time 2.53 ms, the shutdown time 3.48 ms. This motor with only one vibrator is simple and compact, and shows promise to drive joints of robot or to regulate the gesture of some mechanics.

关 键 词： 超声装置 面内 行波 单振子

领　　域： [理学] [理学] [一般工业技术]