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Implementation of a computer-controlled life support system in the acceleration research environment
M Pecaric1, M T Jackson, R R Frampton
1Defence and Civil Institute of Environmental Medicine, Ontario.
Safe Journal
|July 1, 1996
Summary
Researchers developed a computer-controlled system for advanced life support, enabling precise G-suit inflation and positive pressure breathing during acceleration. This system enhances control for aviation research.
Area of Science:
- Aerospace Medicine
- Biomedical Engineering
- Human Factors Research
Background:
- Advanced life support systems utilize electronic control for G-valve and pressure breathing regulators.
- Current research environments have not fully leveraged these technological advancements.
Purpose of the Study:
- To develop a computer-controlled interface for programmable G-suit inflation and positive pressure breathing during +Gz exposure.
- To enhance control over life support system parameters for acceleration research.
Main Methods:
- A Macintosh computer with LabVIEW software controlled G-valve and pressure breathing regulator output pressures.
- Programmable schedules were created based on control inputs like +Gz level and time.
- Subject safety was maintained through hardware limitations and software status checks.
Main Results:
- The system demonstrated accurate and reproducible control of G-suit and mask pressures.
- Inflation time, peak pressure, and deflation rate were effectively managed across various +Gz levels.
- Open-loop algorithms facilitated independent control of multiple regulators.
Conclusions:
- The developed interface provides comprehensive control over life support system parameters for acceleration research.
- This system allows for independent alteration of pressure schedules, independent of +Gz or time.
- It offers precise and reproducible adjustments crucial for advanced life support system studies.