Flight control system

摘要

A flight control system commands drag devices such as flight spoilers according to pilot or autopilot longitudinal command. Furthermore, the flight control system monitors a set of flight parameters to determine whether the aircraft is operating inside the permitted safe envelope, hence, incorporating envelope automatic exceeding disengagement. This invention allows the aircraft to descend in a steeper glide path than the 3° used in the normal approach, while keeping speeds unchanged.

主权项

1. A flight control system for an aircraft having at least one control surface for pitch control and a drag device for producing drag and increasing the angle of the descent path, the flight control system comprising:
a processor structured for receiving a pitch command from a pilot or an autopilot system and monitoring a plurality of flight parameters including angle of attack to ensure that the flight parameters are within a safe operating envelope of the aircraft, and at least one controller coupled to the processor and to the control surface for pitch control and the drag device, the at least one controller controlling the control surface for pitch control and the drag device; the processor being further structured to generate an output to the at least one controller to move the control surface to control aircraft pitch based on the pitch command and the flight parameters; the processor being further structured to produce an output to the at least one controller to move the drag device to reduce the drag produced by the drag device when the angle of attack of the aircraft is greater than a reference value, wherein the drag device comprises a spoiler, and one of said plurality of flight parameters is hyper-lifting device deployment status and said output of the processor to reduce the drag of the spoiler is generated in response to a hyper-lifting device being deployed or deployed beyond a reference state.