초록 ▼

An aircraft ground proximity warning system is disclosed having an inadequate terrain clearance warning mode, wherein the criteria required to generate the warning is modified when the aircraft is flying over undulating or mountainous terrain. The system is responsive to signals representative of th

An aircraft ground proximity warning system is disclosed having an inadequate terrain clearance warning mode, wherein the criteria required to generate the warning is modified when the aircraft is flying over undulating or mountainous terrain. The system is responsive to signals representative of the radio altitude, the barometric altitude, the speed of the aircraft, the flap position and the landing gear position to provide warnings when the aircraft is operating below a predetermined altitude with either or both of the landing gear of the flaps not in a landing configuration. The warning system also provides a warning when the aircraft is traveling above a predetermined speed and below a predetermined altitude irrespective of the configuration of the landing gear or the flaps. Also disclosed is logic circuitry for detecting that the aircraft is flying over undulating or mountainous terrain and modifying the warning envelope during such condition to provide longer warning times.

대표청구항 ▼

A terrain clearance warning system for an aircraft comprising: warning signal generating means for providing a warning signal representative of inadequate terrain clearance while the aircraft is flying over relatively flat terrain; a first source of signals representative of the radio altitude of th

A terrain clearance warning system for an aircraft comprising: warning signal generating means for providing a warning signal representative of inadequate terrain clearance while the aircraft is flying over relatively flat terrain; a first source of signals representative of the radio altitude of the aricraft; a second source of signals representative of the barometric altitude of the aircraft; detectign means for detecting whether the aircraft is flying over undulating terrain, wherein said detecting means does not require signals representative of the longitude or latitude of the aircraft, responsive to said first source of signals and said second source of signals, including comparing means for comparing said radio altitude signals with said barometric altitude signals for developing a difference signal which varies with time as a function of undulating terrain whereby when the difference signal exceeds a predetermined limit an undulating terrain condition exists; and biasing means, responsive to said detecting means, for biasing said warning signal when the aircraft is flying over undulating terrain.