Considering a set of reaction wheels and an array of magnetorquers, we revisit the classical cross product control law" solution for achieving attitude stabilization and momentum damping. In particular, we highlight the existence of a quasi-cascade structure for which asymptotic stability can be obtained by selecting a suciently high gain of the attitude stabilizer. However, we show how the classical solution renders the actuators more inclined to saturate. This is the reason underlying the introduction of a revisited version of this control law which stabilizes the overall system regardless of the aggressiveness of the attitude stabilizer by transforming the quasi-cascade into a real cascade. We then discuss how both strategies are such that the attitude control is aected by the momentum damping task although it should be treated as a secondary goal. To overcome this drawback, we propose a new allocation-based controller which makes the attitude dynamics completely independent of the momentum damping of the reaction wheels while preserving the possibility of considering non-aggressive attitude controllers. Finally, several simulation results enrich these discussions and highlight the pros and cons of the dierent control strategies.

Static Input Allocation for Reaction Wheels Desaturation Using Magnetorquers

Zaccarian, Luca
2013-01-01

Abstract

Considering a set of reaction wheels and an array of magnetorquers, we revisit the classical cross product control law" solution for achieving attitude stabilization and momentum damping. In particular, we highlight the existence of a quasi-cascade structure for which asymptotic stability can be obtained by selecting a suciently high gain of the attitude stabilizer. However, we show how the classical solution renders the actuators more inclined to saturate. This is the reason underlying the introduction of a revisited version of this control law which stabilizes the overall system regardless of the aggressiveness of the attitude stabilizer by transforming the quasi-cascade into a real cascade. We then discuss how both strategies are such that the attitude control is aected by the momentum damping task although it should be treated as a secondary goal. To overcome this drawback, we propose a new allocation-based controller which makes the attitude dynamics completely independent of the momentum damping of the reaction wheels while preserving the possibility of considering non-aggressive attitude controllers. Finally, several simulation results enrich these discussions and highlight the pros and cons of the dierent control strategies.
2013
19th IFAC Symposium on Automatic Control in Aerospace (2013)19th IFAC Symposium on Automatic Control in Aerospace (2013)
NA
NA
9783902823465
J. F., Tregouet; D., Arzelier; D., Peaucelle; Zaccarian, Luca
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/68040
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 3
  • ???jsp.display-item.citation.isi??? ND
social impact