초록 ▼

An underspeed protection system for an aircraft under autopilot control selects a target speed based upon the greater of a minimum maneuver speed and a stick shaker speed. The system then compares a monitored speed to the target speed to produce an error signal. The system also monitors vertical spe

An underspeed protection system for an aircraft under autopilot control selects a target speed based upon the greater of a minimum maneuver speed and a stick shaker speed. The system then compares a monitored speed to the target speed to produce an error signal. The system also monitors vertical speed to determine if tie aircraft begins to descend. If the error signal due to the underspeed condition causes the aircraft to descend, the system provides a hold zero vertical speed signal in place of the error signal such that the aircraft seeks to maintain its altitude. The hold zero vertical speed signal overrides the underspeed error signal such that the aircraft does not pitch forward to seek an increased speed.

대표청구항 ▼

[ I claim:] [1.] An apparatus for producing an underspeed override signal in an aircraft having an autopilot, comprising:a flight speed monitor configured to monitor a flight speed of the aircraft and to produce an electrical signal corresponding to the monitored flight speed;a first minimum maneuve

[ I claim:] [1.] An apparatus for producing an underspeed override signal in an aircraft having an autopilot, comprising:a flight speed monitor configured to monitor a flight speed of the aircraft and to produce an electrical signal corresponding to the monitored flight speed;a first minimum maneuver speed selector producing an electrical signal corresponding to a first minimum maneuver speed;a second minimum maneuver speed selector producing an electrical signal corresponding to a second minimum maneuver speed;a target speed signal generator coupled to receive the electrical signal corresponding to the first minimum maneuver speed and the electrical signal corresponding to the second minimum maneuver speed, the target speed signal generator producing a target signal, the target signal corresponding to the greater of the first minimum maneuver speed and second minimum maneuver speed; andan error signal generator having a first input coupled to receive the electrical signal from the flight speed monitor and a second input coupled to receive the target signal from the target speed signal generator, the error signal generator producing the override signal corresponding to the difference between the target speed and the monitored flight speed in response to the target signal and the electrical signal from the flight speed monitor, the error signal generator having an output coupled to provide the override signal to the autopilot.