论文部分内容阅读
设计和装配了一种新型固态摩擦驱动器（具有对称双面齿和压电陶瓷结构的行波型超声波马达）的实验样机。该样机提供一种新颖的对称式双面设计结构，实现将材料点的椭圆形运动轨迹耦合到两个独立的接触表面，本质上，增大了马达输出力矩的能力。新型马达具有小型量轻、响应速度快、无电磁干扰、力矩波动小、高的力矩密度和输出端不需要齿轮降速机构而直接实现驱动等特点。阐述了新型马达的工作原理，用有限元法（ＦＥＭ）分析了马达振动体部分的各阶振动模态和相应的固有频率，分析中计入了压电陶瓷的压电效应对模态和频率的影响。采用ｖｏｎ－ｍｉｓｅｓ法获得了振动体２Ｄ和３Ｄ动态变形分布和应力分布，数字计算优化了马达的结构形式。
An experimental prototype of a new type of solid state friction drive (traveling wave type ultrasonic motor with symmetrical double-sided teeth and piezoelectric ceramic structure) was designed and assembled. The prototype provides a novel, symmetrical two-sided design that couples the elliptical motion of a material point to two separate contact surfaces, essentially increasing the motor’s output torque. The new motor has the characteristics of small size and light weight, fast response, no electromagnetic interference, small torque fluctuation, high torque density and direct drive without gear reduction mechanism on the output side. The working principle of a new type of motor is expounded. The vibration mode and corresponding natural frequency of each vibration part of the motor are analyzed by finite element method (FEM). In the analysis, the influence of the piezoelectric effect of piezoelectric ceramics on the modal and frequency Impact. Von-mises method was used to obtain the 2D and 3D dynamic deformation distribution and stress distribution of the vibrating body, and the numerical calculation optimized the structure of the motor.