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:
Aug. 05, 2014
Filed:
Feb. 24, 2011
Applicants:
Marko Bacic, Abthorpe, GB;
Jonathan E. Holt, Ilkeston, GB;
Inventors:
Marko Bacic, Abthorpe, GB;
Jonathan E. Holt, Ilkeston, GB;
Assignee:
Rolls-Royce PLC, London, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F01D 7/02 (2006.01); B64C 11/30 (2006.01); B64C 11/44 (2006.01); B64D 27/00 (2006.01);
U.S. Cl.
CPC ...
B64C 11/306 (2013.01); B64C 11/44 (2013.01); Y02T 50/66 (2013.01); B64D 2027/005 (2013.01);
Abstract
A method and arrangement of controlling blade pitch angle of a set of rotor blades. The method comprises providing a target blade pitch angle to a controller mounted on the rotor; measuring the speed of rotation of the rotor using a rate gyro mounted on the rotor; calculating the blade pitch angle required to match the target blade pitch angle by summing the target blade pitch angle and the measured rotational speed; and actuating the blades to the calculated blade pitch angle.