A PROTOTYPE COMPUTER-CONTROLLED LIFE SUPPORT SYSTEM FOR INDEPENDENT REGULATION OF G-SUIT AND PBG PRESSURES

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Authors
  1. Pecaric, M.
  2. Jackson, M.T.
  3. Frampton, R.R.
  4. Maloan, J.
  5. Buick, F.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN);Toronto Univ, Toronto ONT (CAN)
Abstract
Electronic control of the G-valve and pressure breathing regulator is being implemented in some advanced life support systems used in aircrew protection. This technological improvement, however, has not reached its full potential in the research environment. A computer-controlled life support system interface providing programmable schedules for G-suit inflation and positive pressure from a G-valve and pressure breathing during +Gz(PBG) was developed. Ouptut pressures from a G-valve and pressure breathing regulator (Carleton Technologies) were controlled by a Macintosh computer running LabVIEW software. Required pressures were determined as functions of single or multiple control inputs (i.e. +Gz level, a pressure signal, time, etc.). Subject safety was ensured via hardare limitations and status checks incorporated into the software. Experiments conducted at +1 Gz and at various +Gz levels evaluated the computer software-life support hardware interface. Tests verified the system provided accurate and reproducible G-suit and mask pressures. Time of inflation, peak pressure attained, and deflation rate were effectively controlled at all +Gz levels using open-loop algorithms. Independent control of G-suit and PBG pressures was successfully accomplished. TRUNCATED
Keywords
G-Valves;G-Suits
Report Number
DCIEM-94-57 —
Date of publication
01 Jan 1994
Number of Pages
11
DSTKIM No
95-03039
CANDIS No
151999
Format(s):
Document Image stored on Optical Disk;Hardcopy

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