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. 29, 2013
Filed:
Dec. 21, 2012
Fukashi Andoh, Toyota, JP;
Fukashi Andoh, Toyota, JP;
Other;
Abstract
An attitude control device for an in-space propellant depot. A propellant height sensor generates a measured propellant height. A sloshing frequency calculation unit calculates a sloshing frequency based on the measured propellant height. An attitude angle sensor generates a measured attitude angle. A frequency analysis unit generates a plurality of frequency spectra of the measured attitude angle. A dominant flexible mode calculation unit calculates a dominant flexible mode based on the plurality of frequency spectra. A modal coordinate calculation unit calculates a modal coordinate of the dominant flexible mode. A control torque parameter generator calculates a control torque parameter minimizing spectral amplitude of the plurality of frequency spectra. A control torque generator calculates a term of a control torque until the spectral amplitude of the plurality of frequency spectra no longer exceeds a predetermined value.