G - Physics – 01 – C
Patent
G - Physics
01
C
343/15
G01C 5/00 (2006.01) G05D 1/06 (2006.01)
Patent
CA 1071740
TERRAIN CLOSURE WARNING SYSTEM WITH ALTITUDE RATE SIGNAL CONDITIONING ABSTRACT OF THE DISCLOSURE In an aircraft terrain warning system utilizing a radar altimeter wherein the rate of closure to the terrain is compared with the aircraft's altitude above the terrain to generate a warning signal when the closure rate is excessive for a particular altitude, the closure rate signal is limited and biased depending upon the aircraft's closure rate and configuration in order to significantly increase the time response of the system while at the same time reducing nuisance warnings. The amplitude limit on the closure rate signal is varied above a predefined altitude, as a function of the closure rate signal in order to provide increased warning times at greater closure rates. Circuitry, responsive to the aircraft's flap positions, is also provided to alter the characterisitcs of rate limiter so as to provide warning parameters that more accurately reflect operating conditions at lower aircraft speeds. -1-
240582
Bateman Charles D.
Muller Hans R.
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