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. 01, 2017
Filed:
May. 17, 2011
David R. Danielson, Suffield, CT (US);
Paul A. Carvalho, Hadley, MA (US);
Mark Raes, Andover, CT (US);
Robert H. Perkinson, Stonington, CT (US);
David R. Danielson, Suffield, CT (US);
Paul A. Carvalho, Hadley, MA (US);
Mark Raes, Andover, CT (US);
Robert H. Perkinson, Stonington, CT (US);
Hamilton Sundstrand Corporation, Windsor Locks, CT (US);
Abstract
A method of controlling a Counter-Rotating Open-Rotor (CROR) includes mechanically linking a pitch change system of a first rotor with a pitch change system of a second rotor and commanding a Blade Angle (Beta1 commanded) of the first rotor such that a Blade Angle (Beta2 Actual) of the second rotor is a function of the commanded Blade Angle (Beta1 commanded) to provide a linear relationship between an actual Blade angle (Beta1 Actual) and Beta1 commanded of the first rotor and a non-linear relationship between Beta2 Actual and Beta1 commanded.