ETRI Journal

Electronics and Telecommunications Research Institute (한국전자통신연구원)
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Analysis of the Antenna Pointing Instability of a Satellite in Spin-Stabilized Injection Mode

  • Kang, Ja-Young (Telemetry and Command Section, Satellite Communications Division, ETRI) ;
  • Shin, Kwang-Keun (Telemetry, Tracking and Command Section, ETRI)
  • Published : 1994.07.31
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Abstract

A new mathematical model to predict the beam pointing instability of a nonconservative two-body satellite system in spinning injection mode has been developed by using Newton-Euler and projection methods. Since the on-axis and null axis of the omni antenna with toroidal pattern beam form a right angle, wobbling of the antenna on-axis is measured by determining the Euler angles which represent the orientation of the satellite's spin axis. Because of the complexity of the system which is a time varying, nonstationary, nonlinear dynamical system, a numerical method is used for the analysis. Computer simulation results present the effects of the mass distribution and internal mass motion on the antenna beam pointing.

Keywords

References

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