Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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A Study on the Dynamic Stability of Observation Antenna Considering Rotational Speed by Payload Drive Motor

Payload 구동용 모터의 회전 속도를 고려한 관측안테나의 동적 안정성에 관한 연구

  • Kim, Chae Sil (Department of Mechanical Engineering, Changwon National University) ;
  • Shin, Min Jae (Vibration Durability Research Center, Changwon National University) ;
  • Keum, Chang Min (Department of Mechanical Engineering, Changwon National University) ;
  • Kim, Jae Min (Department of Mechanical Engineering, Changwon National University) ;
  • Choi, Hun Oh (C&K Engineering)
  • Received : 2016.06.10
  • Accepted : 2016.07.21
  • Published : 2016.08.01
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Abstract

The article describes the determination of the dynamic stability for an observation antenna, considering the rotational speed by the payload driving motor. A finite element model of the observation antenna was made using the solid and beam elements. The connecting parts between the solid and the beam was adequately coupled. The boundary conditions were made by restriction of the degree of freedoms in the supporting points. With the comparison between the modal analysis results and the rotating speed of the payload driving motor, no resonance for the structure of antenna was identified and first natural frequency was determined under 33 Hz (Seismic Cut-Off Frequency). Therefore, the dynamic stability of the antenna was confirmed by the comparism between the seismic safety criterion and the stress results of the dynamic analysis applied the loading conditions and required response spectrum (RRS).

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References

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