US 12,221,204 B2
System and method for actuating high-lift flight control surfaces
Ehud Tzabari, St-Laurent (CA)
Assigned to BOMBARDIER INC., Dorval (CA)
Appl. No. 16/765,591
Filed by BOMBARDIER INC., Dorval (CA)
PCT Filed Nov. 19, 2018, PCT No. PCT/CA2018/051467
§ 371(c)(1), (2) Date May 20, 2020,
PCT Pub. No. WO2019/100149, PCT Pub. Date May 31, 2019.
Claims priority of provisional application 62/589,079, filed on Nov. 21, 2017.
Prior Publication US 2020/0307775 A1, Oct. 1, 2020
Int. Cl. B64C 13/28 (2006.01); B64C 13/02 (2006.01); B64C 13/38 (2006.01)
CPC B64C 13/38 (2013.01) [B64C 13/02 (2013.01); B64C 13/341 (2018.01)] 14 Claims
OG exemplary drawing
 
1. A system for actuating one or more high-lift flight control surfaces of an aircraft, the system comprising:
a first driveline;
a plurality of first actuators operatively coupled between the first driveline and one or more first high-lift flight control surfaces associated with a first wing of the aircraft, and configured to cause actuation of the one or more first high-lift flight control surfaces in response to being driven by the first driveline, each first actuator being associated with a respective first no-back device configured to prevent an air load on the one or more first high-lift flight control surfaces from driving the one or more first high-lift flight control surfaces; and
a first backup brake applicable to the first driveline,
wherein upon a detection of an unsafe condition, the first backup brake is applied by electrical or hydraulic actuation to counteract a back-driving force applicable to the first driveline by no-more than one of the first actuators associated with an inoperative no-back device, such that the first backup brake compensates a loss of only the one of the first actuators associated with the inoperative no-back device and cannot also compensate a loss of another actuator from the first actuators associated with another inoperative no-back device, when the unsafe condition indicates a loss of a plurality of the first actuators respectively associated with inoperative no-back devices; and
wherein the first backup brake is configured to produce a first maximum braking force that is lower than a maximum driving force applicable to the first driveline by a power drive unit coupled to the first driveline.