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

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 guaranteed
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/186254
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