用于挠性驱动的双足压电作动器的研究

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...

Research on Double feet Piezoelectric Actuator for Flexible Driving

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.