• CN: 11-2187/TH
  • ISSN: 0577-6686

Journal of Mechanical Engineering ›› 2026, Vol. 62 ›› Issue (7): 269-283.doi: 10.3901/JME.260377

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Dynamics Simulation Analysis and Extreme Environment Test Research of Space Hollow-type Ultrasonic Motor

AN Haitao1, JIA Botao1, WANG Liang1, WU Jintao1,2, PAN Song1, ZHAO Gai1   

  1. 1. State Key Laboratory of Mechanics and Control for Aerospace Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016;
    2. Beijing Institute of Control Engineering, Beijing 100190
  • Received:2025-04-13 Revised:2025-10-06 Published:2026-05-25

Abstract: A hollow-type traveling wave ultrasonic motor that can be applied to the extreme environment of space is proposed for the low rotational speed, large speed ratio and high stability operation requirements of the low-speed frame servo drive of the control moment gyro (CMG). Firstly, the dynamic simulation analysis is conducted on the proposed hollow-type ultrasonic motor, the modal and harmonic response analysis of the stator of the hollow-type ultrasonic motor is carried out, and the influence of the key dimensions of the rotor on the contact stress distribution of the hollow-type ultrasonic motor is explored. Secondly, the prototype of the proposed hollow-type ultrasonic motor is fabricated. The vibration characteristics of the stator and the mechanical output characteristics and speed stability of the prototype are tested in a conventional environment. The experimental results show that the stator can be excited the rotating traveling wave, and the mechanical output performance of the prototype can meet the requirements of low-speed frame servo drive of the CMG. Finally, in order to evaluate the adaptability of the prototype to the application environment of the CMG, a relatively comprehensive space extreme environment test is carried out for the first time. The electrical characteristics, mechanical characteristics, temperature rise characteristics, and speed stability of the prototype are tested in a composite environment of vacuum and variable temperature. The experimental results show that the prototype can operate at low speed with load for a long time with a vacuum degree less than 1×10-3 Pa and a temperature range of -10~50 ℃, meeting the technical indicators required for the low-speed frame servo drive of the CMG, verifying the application potential of the space hollow-type ultrasonic motor in the low-speed frame of the CMG.

Key words: hollow-type ultrasonic motor, control moment gyro, dynamics simulation analysis, structural optimization, space simulation environment

CLC Number: