定子齿结构TRUM离散化动力学分析方法  

Analysis Method for Discretization Dynamics of TRUM with Stator Teeth Structure

作　　者：孙鹤旭[1,2,3] 荆锴[1,2] 董砚[1,2] 李国庆[1,2] 

机构地区：[1]河北工业大学控制科学与工程学院,天津300130 [2]河北省控制工程技术研究中心,天津300130 [3]河北科技大学电气工程学院,石家庄050018

出　　处：《振动．测试与诊断》2017年第2期377-383,共7页Journal of Vibration,Measurement & Diagnosis

基　　金：河北省自然科学基金资助项目(E2013202108);河北省研究生创新资助项目(2015);河北省重大科技成果转化资助项目(13041709Z)

摘　　要：基于目前行波型旋转超声电机定转子非线性接触动力学理论研究的复杂性,提出一种简易求解的界面离散化动力学分析方法。首先,着眼于定子齿的离散分布特性,化定转子齿面接触为离散点接触,在定子齿与转子的不同接触状态下,通过引入等效刚度的概念,对定子齿与转子间的轴向作用力进行求解,从而获得定转子的离散等效作用力,确立定转子的相对运动关系;然后,从离散接触点的三维运动特性出发,分析接触过程中的径向和周向摩擦力,从而研究输出机械特性和界面能耗;最后,通过仿真和实验,验证了该方法对接触界面动力学的准确描述。This paper puts forward an analysis method for the dynamics of the contact interface of travelling-wave rotary ultrasonic motors (TRUMs) by discreting the stator/rotor interface to avoid the complexity non-linear deduction of the motor in the recent researches. First, the surface-contact of each stator tooth was equivalent to point-contact, for which the concept of equivalent stiffness of different contact states was proposed to analyze the contact states. The discrete axial forces between the stator teeth and rotor were described as the equivalent stiffness, and the equivalent force between the stator and the rotor was obtained. Thus, the relative movement of the stator and the rotor was calculated, and the axial dynamics characteristics of the stator and the rotor were gained. Then, the radial and circumferential friction was given by the three-dimensional motion in the interface to study the mechanical characteristics and the energy consumption. The final simulations and experiments demonstrated the accurate description of the interface dynamics by the proposed method. © 2017, Editorial Department of JVMD. All right reserved.

关 键 词：行波型旋转超声波电机 定子齿 接触界面 离散化 动力学 

分 类 号：TH113[机械工程—机械设计及理论] TM356[电气工程—电机]