Patent ID: 11958626
Assignee: GULFSTREAM AEROSPACE CORPORATION
Field: Control (Instruments)
Classification: CPC B  G | IPC B  G

Claim 12:
13. An aircraft takeoff weight protection system for an aircraft with an aircraft weight, the aircraft takeoff weight protection system comprising:
a first principles takeoff processor programmed and configured to:
predict a liftoff location and an energy state of the aircraft at a liftoff on a runway based on the aircraft weight and on environmental conditions;

a predictive flight envelope protection processor programmed and configured to:
receive the energy state and the liftoff location from the first principles takeoff processor;
generate a plurality of potential trajectories of the aircraft from the liftoff location based on the energy state; and
assess each of the plurality of potential trajectories for compliance with or violation of a predetermined flight envelope; and

a maximum takeoff weight processor programmed and configured to:
indicate that the aircraft may takeoff at the aircraft weight in response to the predictive flight envelope protection processor determining that any one of the plurality of potential trajectories is in compliance with the predetermined flight envelope;
iteratively reduce an input of the aircraft weight to the first principles takeoff processor in response to the predictive flight envelope protection processor determining that all of the plurality of potential trajectories violate the predetermined flight envelope, iteratively reducing until the predictive flight envelope protection processor indicates that any one of the plurality of potential trajectories is in compliance with the predetermined flight envelope; and
indicate that the input of the aircraft weight as iteratively reduced is a maximum allowable takeoff weight.