Abstract
In this paper an attitude determination and control system for ITU-UUBF LEO1 satellite is proposed. To determine the attitude of the satellite this system uses algebraic method (2-vector algorithm). As a reference direction, the unit vectors toward the Sun and the Earth's center, and the Earth's magnetic field are used. Thus, it includes three different 2-vector algorithms based on using Earth's magnetic field-Sun vector, Earth's magnetic field-nadir vector, and nadir vector-Sun vector couples. A redundant data processing algorithm based on maximum likelihood was designed. The parameters of satellite's rotational motion are estimated using extended Kalman filter (EKF). For control purposes an EKF-based PD controller is designed. To reveal the performance of the designed system a simulation is made.
Original language | English |
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Pages (from-to) | 493-499 |
Number of pages | 7 |
Journal | Acta Astronautica |
Volume | 52 |
Issue number | 2-6 |
DOIs | |
Publication status | Published - Jan 2003 |