US 11,891,919 B2
Automatic blade pitch control
Sébastien Jean Fernand Deneuve, Rouen (FR); and Charles Ying, Paris (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 17/909,010
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR)
PCT Filed Mar. 5, 2021, PCT No. PCT/FR2021/050378
§ 371(c)(1), (2) Date Sep. 2, 2022,
PCT Pub. No. WO2021/176187, PCT Pub. Date Sep. 10, 2021.
Claims priority of application No. 2002249 (FR), filed on Mar. 5, 2020.
Prior Publication US 2023/0094203 A1, Mar. 30, 2023
Int. Cl. F01D 7/02 (2006.01)
CPC F01D 7/02 (2013.01) [F05D 2220/323 (2013.01); F05D 2220/36 (2013.01); F05D 2260/70 (2013.01); F05D 2270/021 (2013.01); F05D 2270/305 (2013.01); F05D 2270/44 (2013.01); F05D 2270/62 (2013.01); F05D 2270/80 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method for controlling a setting angle of vanes or blades of a propeller of a turbomachine, the method comprising generating a setting command, the setting command being a function of a speed of rotation of the propeller and of a rating setpoint,
wherein generating the setting command comprises:
generating, in a nominal controlling line, a nominal setting command as a function of a value of a setting measurement of the vanes or the blades of the propeller, and
generating, in a downgraded controlling line, a downgraded setting command independently of the value of the setting measurement of the vanes or the blades of the propeller,
wherein the method further comprises:
a selection step of selecting the downgraded controlling line so that the setting command is equal to the downgraded setting command, or the nominal controlling line so that the setting command is equal to the nominal setting command,
a supply step of supplying the setting command to an actuator configured to modify the setting angle, and
before the supply step and after the selection step, a command return step so that the setting command is directly sent to at least one of the nominal controlling line and the downgraded controlling line,
wherein the actuator changes the setting angle based on the setting command.