Alarm filtering in a ground proximity warning system

Details Alarm filtering in a ground proximity warning system Alarm filtering in a ground proximity warning system

G - Physics

08

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343/15

G08G 5/04 (2006.01) G01C 5/00 (2006.01) G01S 13/08 (2006.01) G01S 13/94 (2006.01) G05D 1/06 (2006.01)

Patent

CA 1038066

ABSTRACT: In a ground proximity warning system used by aircraft when unsafe flight configurations defin- ed by specified flight warning mode envelopes are de- tected, alarm generation signals are not immediately, given, instead the continuing flight of the aircraft is monitored by an alarm filtering system which uses independently variable maximum and minimum levels and filtering constants which can be incremented and or decremented as functions of the continuing flight of the aircraft and the warning mode envelopes so as to suppress false or unnecessary alarm generation while generating alarms for dangerous flight configurations. The filtering parameters may be varied independently for each flight warning mode. In addition audio war- nings are controlled so that warnings once started are completed in the absence of higher priority war- nings, even if they cease to exist, while still existing interrupted lower priority warnings are regenerated when higher priority warnings have been completed. - 31 -

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