Adaptive pressure control system

Details Adaptive pressure control system Adaptive pressure control system

1985-05-20

1988-01-19

Gruber, Felix D.

Boots, shoes, and leggings

346 33TP, 364509, 364510, 1374875, F16K 3112, G01N 700, G01N 900, G06G 757

Patent

active

047208074

ABSTRACT:
An apparatus and method control the pressure in a system by continuously measuring the pressure and comparing it to a desired set pressure. The apparatus and method record a history of the measured pressure as a function of time and calculate the rates at which the pressure changes. The rates at which the pressure changes are recorded and the rate at which the rates change is also calculated to determine the rate at which the apparatus and method can vary the rate of change of pressure. The apparatus and method calculate the amount of time required to reach the desired set pressure and compare it to the amount of time required for the rate of change of the pressure to become zero and adjust the flow of a gas in the system so that the desired set pressure is achieved at substantially the same time as the rate of pressure change becomes zero.

REFERENCES:
patent: 3665945 (1972-05-01), Ottenstein
patent: 3952759 (1986-04-01), Ottenstein
patent: 4412552 (1983-11-01), Kolbanovsky
patent: 4436110 (1984-03-01), Leeuwma et al.
patent: 4481967 (1984-11-01), Frick
patent: 4550747 (1985-11-01), Woodworth et al.
patent: 4569012 (1986-02-01), Sekozawa et al.
patent: 4597405 (1986-07-01), Oetiker et al.
Automatic Control Engineering, Francis H. Raven, McGraw-Hill Book Co., 1968, Chapter 14, pp. 453-491.

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