State Key Laboratory of Robotics and Systems, Harbin Institute of Technology, Harbin Heilongjiang Province, China.
IEEE Trans Ultrason Ferroelectr Freq Control. 2012 May;59(5):981-9. doi: 10.1109/TUFFC.2012.2283.
A U-shaped linear ultrasonic motor using longitudinal vibration transducers with double feet was proposed in this paper. The proposed motor contains a horizontal transducer and two vertical transducers. The horizontal transducer includes two exponential shape horns located at the leading ends, and each vertical transducer contains one exponential shape horn. The horns of the horizontal transducer and the vertical transducer intersect at the tip ends where the driving feet are located. Longitudinal vibrations are superimposed in the motor and generate elliptical motions at the driving feet. The two vibration modes of the motor are discussed, and the motion trajectories of driving feet are deduced. By adjusting the structural parameters, the resonance frequencies of two vibration modes were degenerated. A prototype motor was fabricated and measured. Typical output of the prototype is no-load speed of 854 mm/s and maximum thrust force of 40 N at a voltage of 200 V(rms).
本文提出了一种使用带有双足的纵向振动换能器的 U 型直线超声马达。所提出的电机包含一个水平换能器和两个垂直换能器。水平换能器包括位于前端的两个指数形状的喇叭，每个垂直换能器包含一个指数形状的喇叭。水平换能器和垂直换能器的喇叭在驱动脚所在的尖端处相交。电机中叠加了纵向振动，在驱动脚上产生椭圆形运动。讨论了电机的两种振动模式，并推导出了驱动脚的运动轨迹。通过调整结构参数，使两种振动模式的共振频率退化。制造并测量了一个原型电机。在 200V(rms)电压下，原型机的空载速度为 854mm/s，最大推力为 40N。
