Jūrėnas Vytautas, Kazokaitis Gražvydas, Mažeika Dalius
Faculty of Mechanical Engineering and Design, Kaunas University of Technology, Studentų str. 56, Kaunas, Lithuania.
Faculty of Fundamental Sciences, Vilnius Gediminas Technical University, Saulėtekio av. 11, Vilnius, Lithuania.
Sensors (Basel). 2020 Feb 4;20(3):834. doi: 10.3390/s20030834.
A novel design of a multiple degrees of freedom (multi-DOF) piezoelectric ultrasonic motor (USM) is presented in the paper. The main idea of the motor design is to combine the magnetic sphere type rotor and two oppositely placed ring-shaped piezoelectric actuators into one mechanism. Such a structure increases impact force and allows rotation of the sphere with higher torque. The main purpose of USM development was to design a motor for attitude control systems used in small satellites. A permanent magnetic sphere with a magnetic dipole is used for orientation and positioning when the sphere is rotated to the desired position and the magnetic field synchronizes with the Earth's magnetic dipole. Also, the proposed motor can be installed and used for robotic systems, laser beam manipulation, etc. The system has a minimal number of components, small weight, and high reliability. Numerical simulation and experimental studies were used to verify the operating principles of the USM. Numerical simulation of a piezoelectric actuator was used to perform modal frequency and harmonic response analysis. Experimental studies were performed to measure both mechanical and electrical characteristics of the piezoelectric motor.
本文提出了一种新型的多自由度（multi-DOF）压电超声电机（USM）设计。电机设计的主要思路是将磁球型转子和两个相对放置的环形压电致动器组合成一个机构。这种结构增加了冲击力，并允许球体以更高的扭矩旋转。开发超声电机的主要目的是为小型卫星的姿态控制系统设计一种电机。当球体旋转到所需位置且磁场与地球磁偶极同步时，具有磁偶极的永磁球用于定向和定位。此外，所提出的电机可安装并用于机器人系统、激光束操纵等。该系统组件数量最少、重量轻且可靠性高。通过数值模拟和实验研究来验证超声电机的工作原理。利用压电致动器的数值模拟进行模态频率和谐波响应分析。进行实验研究以测量压电电机的机械和电气特性。
