US 9,809,303 B2
Rotor position determination system with magneto-resistive sensors
Troy C. Schank, Keller, TX (US)
Assigned to Bell Helicopter Textron Inc., Fort Worth, TX (US)
Filed by Bell Helicopter Textron Inc., Fort Worth, TX (US)
Filed on Sep. 9, 2014, as Appl. No. 14/481,074.
Application 14/481,074 is a continuation in part of application No. 13/601,077, filed on Aug. 31, 2012, granted, now 8,955,792.
Prior Publication US 2015/0069175 A1, Mar. 12, 2015
Int. Cl. B64C 11/00 (2006.01); B64C 27/54 (2006.01); B64C 27/00 (2006.01); G01B 7/00 (2006.01); B64C 27/35 (2006.01); G01D 5/14 (2006.01)
CPC B64C 27/008 (2013.01) [B64C 27/35 (2013.01); G01B 7/003 (2013.01); G01D 5/145 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A rotorcraft, comprising:
a body;
a power train coupled to the body and comprising a power source and a drive shaft coupled to the power source;
a hub coupled to the drive shaft;
a rotor blade;
a grip coupling the rotor blade to the hub; and
a position determination system disposed between the blade and the body, the position determination system comprising:
at least one magnet; and
a plurality of magneto-resistive sensors proximate to the at least one magnet;
wherein the at least one magnet is movable relative to the plurality of magneto-resistive sensors as a function of movement of the grip relative to the hub.