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Modeling and Analysis of Full Perturbation Effects on Satellite Dynamics

Abdolkarimi Khalaji, Ali | 2010

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 40344 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Pourtakdoust, Hossein
  7. Abstract:
  8. Orbit perturbations are most important environmental factors that affecting performance of satellites. These effects mainly in two ways affect the satellite. Through the first, perturbing acceleration, change the orbital elements and the second, moments due to perturbations, couple the dynamics and attitude equations. Various studies regarding how the resources of major perturbations such as direct solar radiation, atmosphere and the third body attractions have been done. However, effects a significant number of other perturbations, such as solar, rotation of the atmosphere, reflected solar radiations, earth oblateness with high order of earth harmonics consideration and small forces (such as earth tides, Relativity and Yarkovsky effects has not been investigated. In this study tried to dominant full orbit perturbations in orbital behavior and simulation are exposed. These effects include atmosphere drag based on the solar activity and rotation of the atmosphere due to zonal and meridional winds, earth oblateness with high order of harmonics consideration, the effect of direct solar radiation, third body attractions (moon and sun) with accurate ephemeris, small forces such Albedo, Relativistic effects and Yarkovsky effects. All models expanded on potential function (Lagrange Equations), force components (Gauss Equations) and perturbation acceleration (Cowell Model) Finally by solving the Lagrange and Gauss Differential Equations and cowell method in three types of orbits (LEO-MEO-HEO), with using of Omid satellite characteristics, we could analyze and simulate all of perturbations
  9. Keywords:
  10. Orbital Perturbation ; Satellites ; Orbital Elements

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