新型方尖塔形定子二自由度超声电机的结构设计、驱动机理与性能研究  

Research on construction,principle,and performances of a novel two-degrees of freedom ultrasonic motor with an obelisk stator

作　　者：金家楣[1] 张建辉[1] 赵淳生[1] 

机构地区：[1]南京航空航天大学精密驱动研究所,南京210016

出　　处：《振动与冲击》2009年第12期63-67,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(10874090);国家自然科学基金资助项目(50775109);江苏省自然科学基金资助项目(BK2009373)

摘　　要：提出一种新型二自由度超声电机结构及工作原理。该电机具有一个方尖塔形定子和一个具有凹球面的基座,定子由预压力弹簧压在基座的凹球面上。利用定子局部弯曲振动作为工作模态,使得该型电机易于小型化。有限元仿真观察到了定子驱动端的椭圆运动,作用于球面基座可驱动定子运动。原理样机性能为:x方向最大速度145 mm/s,y方向最大速度180 mm/s,x方向最大推力4.3 N,y方向最大推力5.0 N。A novel two-degrees of freedom ultrasonic motor was proposed.The motor is composed of an obelisk stator and a base with a concave spherical surface.The stator is pressed to be in contact with the concave spherical surface by means of an opportune pre-pressure system.It is easy to miniaturize the motor,because the local flexural vibrations of the stator are utilized as the operating modes of the motor instead of the longitudinal vibrations.The elliptical motion of the top of the stator observed in simulation with FEM(finite element method) can make the stator move when the top is pressed on the concave spherical surface of the base.The performance characteristics achieved by the prototype are: the speed without load 145mm/s in x-direction,the speed without load 180mm/s in y-direction,the stall thrust 4.3N in x-direction,the stall thrust 5.0N in y-direction.

关 键 词：超声电机 二自由度 塔形定子 

分 类 号：TB522[理学—物理]