Research on Construction，Principle，and Performances of a Novel Two-degree of Freedoms Ultrasonic
Jiamei Jin;Jianhui Zhang;Chunsheng Zhao
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Precision Drive Laboratory, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016 China
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收稿日期
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出版日期
2008-11-19
2008-11-28
2009-12-25
发布日期
2009-12-25
摘要
提出了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145mm/s, y 方向最大速度180mm/s, x 方向最大推力4.3N,y方向最大推力5.0N。
Abstract
A novel two-degree of freedoms ultrasonic motor was proposed in this paper. The motor is composed of an obelisk stator and a base with a concave spherical surface. The stator is pressed in contact to the concave spherical surface of the base by means of an opportune pre-pressure system. It is easy to miniaturize the motor，because the operating modes of the motor has utilized the local flexural vibrations but the longitudinal vibrations. The ellipse motion of the top of the stator observed using 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 along x-direction, the speed without load 180mm/s along y-direction, the stall thrust 4.3N along x-direction，the stall thrust 5.0N along y-direction.
Jiamei Jin;Jianhui Zhang;Chunsheng Zhao.
Research on Construction，Principle，and Performances of a Novel Two-degree of Freedoms Ultrasonic[J]. Journal of Vibration and Shock, 2009, 28(12): 63-67
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