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:
Oct. 08, 1996
Filed:
Apr. 20, 1994
Issam-Maurice Achkar, Cannes la Bocca, FR;
Pierre-Yves Renaud, Mandelieu, FR;
Michel Sghedoni, Cannes, FR;
Pierre Guillermin, Nice, FR;
Abstract
Method and apparatus for calibration of a set of rate gyros on a three-axis stabilized satellite in orbit, the satellite including an attitude sensing system including the set of rate gyros, a set of actuators and control logic adapted to apply to the set of actuators control signals U derived from measurement signals M supplied by the attitude sensing system. From a time t.sub.0 satellite attitude errors (E1) relative to a reference frame of reference and constant drifts (E2) of the set of rate gyros about three axes (XYZ) of the satellite are estimated conjointly. The estimated values of the attitude errors and the difference between the measured speeds (.omega.) of the set of rate gyros and the estimated values of the constant drifts are applied in real time to the control logic and these estimated values of the constant drifts are stored when they become constant to within a first predetermined tolerance and the estimated values of the attitude errors become constant to within a second tolerance.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile