Zoom climb prevention system for enhanced performance

Abstract

A vehicle, such as an airplane sets a limit for a control variable used to deflect a control surface. The limit is set as a function of an unfavorable flight condition / target angle of attack and a rate of change of angle of attack so that a pilot control variable command is prevented from exceeding the limit to prevent the vehicle from reaching an unfavorable flight condition and / or exceeding a desired angle of attack limit.

Description

technical field [0001] The present disclosure relates generally to aircraft controls, and more particularly to preventing adverse flight conditions at high angles of attack or beyond desired angles of attack in fly-by-wire aircraft. Background technique [0002] fly-by-wire aircraft attempt to limit the angle of attack to prevent unfavorable flight conditions (UFC) that can occur at high angles of attack, including reduction of lift beyond acceptable limits, high speed buffeting, pitch-up, lateral instability, or these combination of states. These conditions can be avoided by limiting the angle of attack to about at or slightly below the angle of attack beyond which these undesirable characteristics would occur. Angle of attack is closely related to speed (airspeed) and increases inversely with speed. Rapid deceleration, however, can cause the current angle of attack to rapidly exceed the desired angle of attack limit and expose the aircraft to difficult control or any of ...

AI Technical Summary

Problems solved by technology

however, rapid deceleration can cause the current angle of attack to rapidly exceed the desired angle of attack limit and expose the aircraft to difficult control or any of the other undesirable characteristics mentioned above

Images