Low Earth orbit satellite attitude control by fractional control laws

Details Low Earth orbit satellite attitude control by fractional control laws Low Earth orbit satellite attitude control by fractional control laws

Nov 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004esasp.571e..29k&link_type=abstract

Proceedings of The 4S Symposium: Small Satellites, Systems and Services (ESA SP-571). 20 - 24 September 2004, La Rochelle, Franc

Computer Science

Performance

Scientific paper

Dans cet article, le controle d'attitude trois-axes d'un satellite par roues de reaction est etabli par les methodes fractionnaires. Dans le but d'expliquer les avantages de ces methodes, une etude comparative a etablie entre la methode lineaire quadratique (LQR) et la methode fractionnaire (FOC). Le but de cette etude est de realiser une loi de controle efficace satisfaisant des specifications donnees, et maintenant la stabilite et les performances requises meme en presence des incertitudes sur les parametres intrinsiques du systeme et sous l'effet des perturbations externes. Mots-cles : controle fractionnaire ; controle d'attitude trois-axes ; roues de reaction ; systeme quasi-bilineaire ; controle optimal. Abstract Fractional order control (FOC) methods are applied to the three-axis reaction wheels satellite attitude control. In order to show the advantages of this method, a comparative study between a Linear Quadratic Regulator (LQR) and a FOC is established through two principal fractional control laws. The aim of this paper is to establish an efficient control law which satisfies a given specifications, and maintains sufficient stability and accuracy even under the strong effects of intrinsic parameters uncertainties, and also external perturbations. Keywords: fractional control; 3-axis attitude control; reaction wheels; quasi-bilinear system; optimal control

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