用于挠性驱动的双足压电作动器的研究  

Research on Double-feet Piezoelectric Actuator for Flexible Driving

作　　者：乔冠尧 何勍[1] 郭栋 QIAO Guanyao;HE Qing;GUO Dong(College 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1期94-98,共5页Piezoelectrics & Acoustooptics

摘　　要：为了进一步拓展压电式挠性驱动的研究和大包角挠性驱动机理,该文提出了一种用于挠性驱动的双足压电作动器。压电作动器结构为带有两圆柱驱动足的方形截面梁,在驱动足外圆柱面加工螺旋槽,既保证了挠性丝与驱动足的充分接触,又使挠性丝缠绕多圈时不会相互影响。根据设计思路,使用ANSYS有限元分析软件建立压电作动器的有限元模型,并确定其合适的工作模态。结果表明,利用有限元分析可得到压电作动器的两同频正交二阶弯曲模态的固有频率为27.8 kHz。通过理论分析与数值模拟探索了正压力及包角大小对驱动效果的影响,并在一种旋转直线超声电机振子上验证其可行性。A double-feet piezoelectric actuator for flexible driving is proposed to expand the research of piezoelectric flexible driving and the mechanism of large wrap angle flexible driving.The piezoelectric actuator is a square cross-section beam with two cylindrical driving feet.The outer cylindrical surface of the driving feet is processed with spiral grooves,which not only ensures the full contact between the flexible wire and the driving feet,but also prevents the flexible wire from interfering each other when winding multiple turns.According to the design idea,ANSYS finite element analysis software is used to establish the finite element model of piezoelectric actuators and the appropriate working mode is determined.The finite element analysis shows that the natural frequency of the two co-frequency orthogonal second-order bending modes of the piezoelectric actuator is 27.8 kHz.The influence of positive pressure and wrap angle on the driving effect is explored through theoretical analysis and dynamic simulation,and the feasibility is verified on a rotating linear ultrasonic motor vibrator.

关 键 词：压电作动器 挠性驱动 弯曲模态 摩擦驱动 

分 类 号：TN384[电子电信—物理电子学] TM22[一般工业技术—材料科学与工程]