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:
Jul. 07, 2015
Filed:
Feb. 14, 2014
Applicant:
The Boeing Company, Chicago, IL (US);
Inventors:
Tung-Ching Tsao, Torrance, CA (US);
Richard Y. Chiang, Torrance, CA (US);
Assignee:
The Boeing Company, Chicago, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
G01C 21/02 (2006.01); B64G 1/36 (2006.01); B64G 3/00 (2006.01); G01P 21/00 (2006.01);
U.S. Cl.
CPC ...
B64G 1/36 (2013.01); B64G 3/00 (2013.01); G01P 21/00 (2013.01); G01C 21/02 (2013.01);
Abstract
An attitude estimator that uses star tracker measurements and enhanced Kalman filtering, with or without attitude data, to provide three-axis rate estimates. The enhanced Kalman filtering comprises taking an average of forward and rearward propagations of the Kalman filter states and the error covariances. The star tracker-based rate estimates can be used to control the attitude of a satellite or to calibrate a sensor, such as a gyroscope.