US 12,304,623 B2
Blended airspeed technique for helicopter control at low airspeeds
Jay Benjamin Monahan, Toms River, NJ (US); and Erez Eller, Oakville, CT (US)
Assigned to LOCKHEED MARTIN CORPORATION, Bethesda, MD (US)
Filed by LOCKHEED MARTIN CORPORATION, Bethesda, MD (US)
Filed on Jul. 8, 2022, as Appl. No. 17/860,745.
Prior Publication US 2024/0010330 A1, Jan. 11, 2024
Int. Cl. B64C 27/00 (2006.01); B64D 45/00 (2006.01); G01P 5/16 (2006.01)
CPC B64C 27/00 (2013.01) [B64D 45/00 (2013.01); G01P 5/16 (2013.01); B64D 2045/0085 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for controlling a rotary wing aircraft, the method comprising:
determining a measured airspeed of the rotary wing aircraft based on data from a pitot probe;
determining an estimated airspeed of the rotary wing aircraft based on rotor control commands;
determining a blended airspeed based on both the measured airspeed and the estimated airspeed; and
controlling one or more actuators of the rotary wing aircraft based on the blended airspeed.