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. 30, 2018
Filed:
Jan. 06, 2015
Applicant:
Honeywell International Inc., Morristown, NJ (US);
Inventor:
Subhabrata Ganguli, Fort Worth, TX (US);
Assignee:
Honeywell International Inc., Morris Plains, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01C 19/56 (2012.01); G01C 21/18 (2006.01); B64C 19/00 (2006.01); G01C 25/00 (2006.01);
U.S. Cl.
CPC ...
G01C 21/18 (2013.01); B64C 19/00 (2013.01); G01C 25/005 (2013.01);
Abstract
A method to level an inertial reference system of a helicopter with reference to the local vertical frame is provided. The method includes powering up the helicopter; outputting sensor data from at least one gyroscope and at least one accelerometer to a mode-selecting processor; executing a fast Fourier transform algorithm on the sensor data at the mode-selecting processor; and selecting one of a plurality of operation modes of the helicopter as a current-operation mode based on the execution of the fast Fourier transform algorithm.