双足压电振子驱动模式的比较研究  

Comparative Study on Driving Modes of Double-Feet Piezoelectric Vibrator

作　　者：余祥瑞 何勍[1] 赵彦东 杨金波 YU Xiangrui;HE Qing;ZHAO Y;ong;YANG Jinbo(Department of Mechanical Engineering and Automation,Liaoning University of Technology,Jinzhou 121001,China)

机构地区：[1]辽宁工业大学机械工程与自动化学院,辽宁锦州121001

出　　处：《压电与声光》2021年第6期825-829,共5页Piezoelectrics & Acoustooptics

基　　金：辽宁省教育厅基础研究基金资助项目(JJL202015401)。

摘　　要：为比较驻波直线超声电机双驱动足同时驱动与交替驱动的两种工作模式,该文提出了一种多足驱动的超声电机振子。该振子双侧共有4个驱动足,其中一侧的2个驱动足实施同时驱动模式,另一侧的2个驱动足实施交替驱动模式,便于比较及分析两种模式之间的性能差异。通过有限元仿真确定了压电振子的结构尺寸、弯曲工作模态及固有频率,制作振子并开展了振子的振动特性和输出性能及其比较的实验研究。实验结果表明,在激励电压峰-峰值100 V、谐振频率26.30 kHz的条件下,交替驱动时空载速度和最大输出力比同时驱动提高了14%和40%。在交替驱动模式下,避免了因多个驱动足互相干扰动子而导致压电振子输出功率降低的问题,输出速度和输出力得以提高,与同时驱动模式相比,交替驱动模式有利于改善输出性能。In order to compare the two working modes of a standing wave linear ultrasonic motor with simultaneous double driving feet and alternative driving feet,this paper proposes a ultrasonic motor vibrator with multi-feet driving modes.There are four driving feet on both sides of the vibrator,of which two driving feet on one side implement a simultaneous driving mode,and the other two driving feet on the other side implement an alternate driving mode,which is convenient to compare and analyze the performance differences between the two modes.The structure size,bending working mode and natural frequency of the piezoelectric vibrator are determined by finite element simulation.The vibrator is manufactured and the experimental study on the vibration characteristics and output performance of the vibrator and its comparison are carried out.The experimental results show that under the conditions of peak-to-peak excitation voltage of 100 V and resonance frequency of 26.30 kHz,the no-load speed and maximum output force of the alternate driving mode are increased by 14%and 40%compared with the simultaneous driving mode.In the alternative drive mode,the piezoelectric vibrator avoids the problem that multiple driving feet interfere with the slider and causes the output power of the piezoelectric vibrator to decrease,the output speed and output force are improved.Compared with the simultaneous driving mode,the alternative driving mode is beneficial to improve the output performance.

关 键 词：直线超声电机 驻波 压电振子 弯曲模态 驱动模式 

分 类 号：TN384[电子电信—物理电子学] TB535[理学—物理]