Aircraft aircrew life support systems

Details Aircraft aircrew life support systems Aircraft aircrew life support systems

1991-06-11

1994-05-24

Cohen, Lee S.

Surgery

Antigravational systems

Body suits

600 19, B64D 1000

Patent

active

053144023

ABSTRACT:
Inflation pressure of an aircrew G-suit is set by a servo-pressure which controls movement of inflation gas supply and vent valves 126 and 127, respectively. Servo-pressure is regulated by a torque motor controlled valve 124, 125 which receives a servo-demand signal from an electronic control unit (ECU) 123. The ECU receives an inflation pressure demand signal P.sub.DEM from an aircraft systems computer 120 which stores schedules of G-suit inflation pressure against increasing acceleration and decreasing cabin ambient pressure. The computer is programmed to look-up and output the higher one of values for inflation pressure dependent upon values of acceleration signals G.sub.Z and cabin ambient pressure signals P.sub.AMB input to the computer by sensors 121 and 122, respectively. The ECU compares an existing G-suit inflation pressure P.sub.O signal with the inflation pressure demand signal and generates a compensated error signal which is combined with the inflation pressure demand signal to provide the servo-demand signal. The use of the ECU for the computationally intensive control task optimizes the use of the aircraft system computer. A combined breathing demand regulator and G-suit inflation pressure control valve which continues to function in the absence of electrical power after bail-out from an aircraft is also disclosed.

REFERENCES:
patent: 3672384 (1972-06-01), Hellquist
patent: 3734078 (1973-05-01), Cramer et al.
patent: 3780723 (1973-12-01), Van Patten et al.
patent: 4230097 (1980-10-01), Beaussant et al.
patent: 4534338 (1985-08-01), Grosbie et al.
patent: 4638791 (1987-01-01), Krogh et al.
patent: 4906990 (1990-03-01), Robinson
patent: 5127896 (1992-07-01), de Gaston

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