Cycle time control of an onboard oxygen generation system.
The outlet oxygen concentration of an onboard oxygen generation system (OBOGS) is controlled in this study by varying the cycle time of a pressure swing adsorption process. The control of the oxygen concentration is highly desirable since both high and low concentrations of oxygen can cause physiological problems. This cycle time control method can be easily implemented using a DC motor and a simple electronic controller. The physiological requirements recommended for high-performance tactical aircraft can be met by this method with either an open-loop or closed-loop configuration. The open-loop configuration requires the measurement of crew breathing flowrate and cabin pressure. The closed-loop configuration requires an additional measurement of oxygen concentration, but it has the advantage of being more adaptive to system variability during setup and operation. The method in either configuration requires very little adjustment and setup time in order to meet the specifications.
Beaman
J J
JJ
University of Texas, Austin 78712.
Wang
S Y
SY
Masada
G Y
GY
D000388:Air; D000401:Aircraft; D001698:Biomedical Engineering; D006801:Humans; D010100:Oxygen; D011312:Pressure; D013997:Time Factors
D010100:Oxygen