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:
Jan. 10, 1984
Filed:
Jan. 22, 1981
Ludwig Muhlfelder, Livingston, NJ (US);
Kevin J Phillips, Hightstown, NJ (US);
Steven L Blasnik, Cambridge, MA (US);
RCA Corporation, New York, NY (US);
Abstract
A system for actively damping nutation of a satellite and/or aligning the pitch axis of a momentum bias satellite with some external reference includes a magnetic torquing means which is energized with currents of appropriate polarity and magnitude to effect the necessary torque to reduce nutation. A roll sensor produces signals proportional to the roll error of the satellite. A control signal is generated a predetermined time period after the roll error exceeds a predetermined threshold. The predetermined time period is a fraction x of the nutation period t.sub.n of the satellite or x+n(t.sub.n) where n is an integer.