【作者】 陈西府； 徐晶晶； 王寅； 黄卫清；

【Author】 Xi-fu CHEN~(1,2),Jing-jing XU~1,Yin WANG~1,Wei-qing HUANG~1 1 Precision Driving Laboratory,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China 2 Department of Mechanical Engineering,Yancheng Institute of Technolgy,Yancheng 224051,China

【机构】 江苏省南京市御道街29号南京航空航天大学精密驱动所； 江苏省盐城市希望大道9号盐城工学院机械工程系；

【摘要】 提出了一种非共振式、工作频带宽的压电直线电机。通过对摩擦驱动机理的研究,把电机的工作过程分解为驱动过程和脱离过程。根据电机的模型,把电机定子和动子间的完全脱离定义为两者之间无接触应变。建立了电机定子的振动模型,并推导了振动微分方程,从而提出了影响电机定子和动子完全脱离的三个因子:激励频率、压电叠堆的振幅、电机的预压力。制作了电机样机一台并进行了实验研究。理论和实验均表明,当激励频率高于临界频率、压电叠堆的振幅大于某一数值时,电机才能够实现完全脱离。更多还原

【Abstract】 A new type of linear motor is introduced which can work under non-resonant condition with a wide frequency range.The friction driving mechanism of motor was investigated and working process of the motor was described as driving process and detachment process.Then complete detachment was defined as no strain between the stator and the slider.Further,the vibration differential equation was deduced and three factors including the exciting frequency and the preload of the motor were produced.Finally,the prototype was fabricated and investigated by experiments.It is proved theoretically and by experiment that the complete detachment can be attained with the exciting frequency exceeding the critical frequency and the amplitude of the piezoelectric stacks above a certain value.更多还原