Effects of Liquid Fuel on Spacecraft's Moment of Inertia and Motion during Reorientation

방향전환 기동 시 액체연료가 위성체의 관성모멘트 및 자세운동에 미치는 영향 분석

  • 강자영 (한국항공대학교 항공운항학과) ;
  • 이상철 (한국항공대학교 항공우주 및 기계공학부)
  • Published : 2009.03.31


In this paper, reorientation based on angular momentum exchange is applied for a bias momentum stabilized satellite, which is equipped with a spherical fuel tank, and the effect of liquid slosh on the attitude properties such as inertia tensor and angular rate is investigated. In order to represent the slosh motion of liquid an equivalent mechanical model is adopted and full nonlinear equations of motion for three-body system are derived. Computer simulations are performed for several cases, which use the viscosity of liquid and the center location of the tank as input parameters, mainly in order to observe how the viscosity of liquid and the center location of the tank influence the spacecraft’s attitude. The investigation includes observing time-variations of the inertia tensor, especially presence of components of product of inertia during the maneuver.


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