| 纵弯模态复合的两自由度直线超声电机 |
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| 作者姓名： | 李志荣 |
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| 作者单位： | [1]苏州市职业大学机电工程系,中国苏州215104 [2]南京航空航天大学超声电机研究中心,中国南京210016 |
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| 摘 要： | 所研制的两自由度直线超声电机由一个圆柱形定子和一个滑板组成.通过三组压电陶瓷元件在定子上分别激励出两个互相垂直的弯振模态和一个纵振模态.任一弯振模态和纵振模态的组合,可以驱动滑板沿x或y方向作直线运动.本文从提高电机的输出性能和驱动效率出发,提出了电机设计的要点.这些要点包括工作模态的选择、模态频率的一致性、压电陶瓷元件和支承元件的位置、预压力的大小和干扰模态的影响等.
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| 关 键 词： | 超声电机 直线运动 定子 模态 ultrasonic motor linear motion stator mode 纵弯模态 两自由度 直线超声电机 VIBRATION MODES BENDING LONGITUDINAL ULTRASONIC MOTOR influence interfering modes placement supporting plane consistency modal selection issues improving motor output |
| 修稿时间： | 2006/9/27 0:00:00 |
LINEAR ULTRASONIC MOTOR WITH 2-DOF USING LONGITUDINAL AND BENDING VIBRATION MODES |
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| Authors: | Li Zhirong |
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| Institution: | 1. College of Mechanical and Electrical Engineering, Suzhou Vocational University, Suzhou, 215104, P. R. China; 2. Research Center of Ultrasonic Motor, NUAA, 29 Yudao Street, Nanjing, 210016, P. R. China |
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| Abstract: | A two-degree-of-freedom (2-DOF) linear ultrasonic motor (USM) consists of a cylinder-shaped stator and a slider. Two bending vibration modes with orthogonality and one longitudinal vibration mode are excited in the stator by three groups of piezoelectric ceramic elements. The combinations of any one bending mode and the longitudinal mode mentioned above push the slider to move linearly in direction x or y. Some key issues for improving the motor output properties and efficiency are given. They include selection of the vibration modes, consistency of the modal frequencies, placement of the piezoelectric ceramic elements and the supporting plane, setting of pre-pressure, and influence of interfering modes. |
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| Keywords: | ultrasonic motor linear motion stator mode |
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