The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 16, 2010
Filed:
Oct. 29, 2004
Ange Defendini, Montjoire, FR;
Mehdi Ghezal, Toulouse, FR;
Ange Defendini, Montjoire, FR;
Mehdi Ghezal, Toulouse, FR;
EADS Astrum SAS, Toulouse Cedex, FR;
Abstract
A method of controlling the attitude of a satellite () including two gyrodynes () and a third main actuator () which delivers torques at least along the Z axis. The method includes: fixing the gimbal axes, Aand A, of the gyrodynes () parallel to Z; setting a non-zero bias (α) between the angular momentum vectors (Formula I) of the gyrodynes; using the measurements provided by the sensors on board the satellite to estimate the kinematic and dynamic variables necessary in order to control the attitude of the satellite (); calculating set variables in order to the objectives assigned to the satellite () attitude control system; and using the deviations between the estimated variables and the set variables to calculate control orders and to send same to the main actuators ().