Journal of Astronautics ›› 2018, Vol. 39 ›› Issue (5): 562-568.doi: 10.3873/j.issn.1000-1328.2018.05.011

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Experimental Research on Vibration Suppression for a Flywheel Based on Nonlinear Energy Sink

LIU Hai ping, WANG Yao bing, SUN Peng fei, LUO Jie, YIN Xin zhe   

  1. 1. Beijing Institute of Spacecraft System Engineering, Beijing 100094, China;
    2. Beijing Key Laboratory of Intelligent Space Robotic Systems Technology and Applications, Beijing 100094, China
  • Received:2017-09-27 Revised:2018-01-04 Online:2018-05-15 Published:2018-05-25

Abstract:

A nonlinear energy sink (NES) with a thin metal beam as its nonlinear stiffness element is provided in this paper. In order to verify the effectiveness of the nonlinear energy sink, a test rig of a flywheel system is constructed. Compared with the vibrational responses from the different typical parts in the test rig with and without the NES, the effectiveness of the NES is verified under the different excitations from the impact hammer and the rotating flywheel. The dynamic responses data are transferred to time-domain and frequency-domain respectively by using the Fourier transform. According to the experimental results, it can be concluded that the performance of the directional energy transfer of the NES is excited from the transient excitation and steady state loading respectively. In addition, the responses of the device position and flywheel position in the flexible bracket are suppressed due to the influence from the NES. However, its effectiveness is restricted for the lumped mass and the damping coefficient of the NES are all too small.

Key words: Nonlinear energy sink, Thin metal beam, Flywheel, Vibration suppression, Experimental study

CLC Number: