利用音叉共鸣结构的大振幅双足压电直线电机  

A large Amplitude Bipedal Piezoelectric Linear Motor with Tuning Fork Resonance Structure

作　　者：席聪 李朝东[1] 柏锴 李乐鲜 XI Cong;LI Chaodong;BAI Kai;LI Lexia

机构地区：[1]上海大学机电工程及自动化学院,上海201900

出　　处：《计量与测试技术》2020年第5期41-45,共5页Metrology & Measurement Technique

基　　金：国家自然科学基金(项目编号51577112)的资助。

摘　　要：本文提出了一种根据人类行走姿态加以抽象的新型双足压电直线电机。音叉共鸣结构的引入使得驱动足可以产生大振幅,而且提高了压电换能效率,低电压即可驱动。驱动足实现大振幅的意义在于大大降低了对于导轨的要求,木轨、塑料轨等首次成为压电超声波电机的驱动导轨。本文建立了该电机简化的动力学模型,分析了定子拓扑结构、配重等设计参数对于输出机械性能的影响,给出了设计准则。通过实验测出了该电机的输出特性,最高输出速度为210mm/s,最大输出力为0. 5N。In this paper a novel bipedal piezoelectric linear motor based on human walking posture is presented.The introduction of the resonance structure of the tuning fork enables the driving foot generate large amplitude,and improves the piezoelectric energy exchange efficiency,that the motor can work in low voltage.The significance of the large vibration amplitude of the driving foot is that the requirements for the guide rail are greatly reduced,For the first time,the wood track and plastic track became the driving guide of the piezoelectric ultrasonic motor.In this paper,the simplified dynamic model of the motor is established,the influence of design parameters such as stator topology and counterweight on output mechanical performance is analyzed,and the design criterion is given.The maximum output speed of the motor is 210 mm/s,and the maximum output force is 0.5 N.

关 键 词：压电直线电机 音叉形 弯曲模态复合 大振幅 

分 类 号：TM359[电气工程—电机]