Abstract

The human respiratory system is compared to a techno logical feedback control system. Oscillation of the tech nological system is discussed and related to abnormal oscillation of human respiration (Cheyne-Stokes breath ing). A mathematical model of the human respiratory control system, utilizing CO 2 control of respiration only, is derived and programmed on an analog computer. The resulting computer study has shown that, as in the tech nological system, an increase of open-loop gain and/or delay time around the open loop can cause the respiratory system to become unstable and oscillate in an abnormal manner.

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