SMART is a three-axis stabilized microsatellite aimed mainly at remote sensing applications in sun-synchronous orbits. This paper investigates the possibility of using only three magnetic actuators to operate the microsatellite attitude control within the requested accuracy (nadir pointing within 0.1°). Microsatellite volume constraints impose the use of magnetic actuators of small size. Considering also electric power constraints, this leads to the necessity of using magnetic-core wound solenoids, which do not guarantee the requested control accuracy due to magnetic moment uncertainty. This problem can be solved by the use of a non-linear control technique based on Pulse Width Modulation. Numerical results show that the requested control accuracy can be guaranteed
SmArT PWM Attitude Control by means of Magnetic Actuators / Pastena, M.; Grassi, Michele. - STAMPA. - Science and Technology series, vol. 105:(2001), pp. 1-8. (Intervento presentato al convegno 52nd International Astronautical Congress tenutosi a Tolosa nel 1-6 Ottobre 2001).
SmArT PWM Attitude Control by means of Magnetic Actuators
GRASSI, MICHELE
2001
Abstract
SMART is a three-axis stabilized microsatellite aimed mainly at remote sensing applications in sun-synchronous orbits. This paper investigates the possibility of using only three magnetic actuators to operate the microsatellite attitude control within the requested accuracy (nadir pointing within 0.1°). Microsatellite volume constraints impose the use of magnetic actuators of small size. Considering also electric power constraints, this leads to the necessity of using magnetic-core wound solenoids, which do not guarantee the requested control accuracy due to magnetic moment uncertainty. This problem can be solved by the use of a non-linear control technique based on Pulse Width Modulation. Numerical results show that the requested control accuracy can be guaranteedI documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
