Communications: electrical – Selective – Having indication or alarm
Patent
1975-07-18
1976-05-18
Kunin, Stephen G.
Communications: electrical
Selective
Having indication or alarm
73178R, 73178T, 2351502, 23515022, 244180, 244183, 343 7TA, G01C 500
Patent
active
039582191
ABSTRACT:
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 characteristics of rate limiter so as to provide warning parameters that more accurately reflect operating conditions at lower aircraft speeds.
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Brantley, James Q., "Radar Offers Solution to Midair Collisions," Electronics, Nov. 1954, pp. 146-150.
Bateman Charles Donald
Muller Hans Rudolf
Killingsworth Ted E.
Kunin Stephen G.
McMurry Michael B.
Sundstrand Data Control Inc.
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