Volume 39 Issue 3
Mar.  2013
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Yang Kai, Cui Long, Huang Haiet al. Multi-degree-of-freedom vibration suppression of space trusses based on multiple dynamic vibration absorbers[J]. Journal of Beijing University of Aeronautics and Astronautics, 2013, 39(3): 295-299. (in Chinese)
Citation: Yang Kai, Cui Long, Huang Haiet al. Multi-degree-of-freedom vibration suppression of space trusses based on multiple dynamic vibration absorbers[J]. Journal of Beijing University of Aeronautics and Astronautics, 2013, 39(3): 295-299. (in Chinese)

Multi-degree-of-freedom vibration suppression of space trusses based on multiple dynamic vibration absorbers

  • Received Date: 11 Oct 2011
  • Publish Date: 31 Mar 2013
  • To implement vibration control of large and light flexible space trusses (LLFST), an adaptive method of suppressing MDOF vibrations of trusses via multiple dynamic vibration absorbers (DVA) was presented. Firstly the single-input and single-output (SISO) control strategy for MDOF vibration control with multiple DVAs was interpreted. Secondly the adaptive control effectiveness of a single DVA subjected to multi-frequency vibrations was proved by simulations. The adaptive algorithm is multi-frequency adaptive disturbance canceller (ADC) which is utilized for suppressing the multi-frequency vibration adaptively without the knowledge of the precise model. The simulation results show that the vibrational attenuations of each frequency component are 62.38 dB and 42.51 dB respectively, compared with passive DVA. Finally, an experiment on the three DOF vibration control of a triangular truss via multiple DVAs was conducted. The experimental results show that the single-frequency vibrational attenuations of each DOF are 95.13%, 93.59% and 95.01%, respectively,and the multi-frequency vibrational attenuations of each DOF are 94.26%, 91.55% and 93.42%, respectively.

     

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