Air system control
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United States of America Patent
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-
Dec 24, 1996
Grant Date -
N/A
app pub date -
Mar 3, 1994
filing date -
Mar 3, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Control system for maintaining selected pressure in a gas distribution system including a header and multiple takeoffs from the header including a compressor to supply gas to the header at selected pressure range, a control valve in the header upstream of the first takeoff, an actuator to operate the valve to modulate flow to the header, a pressure transducer to measure the pressure of the gas in the header between the valve and the first takeoff, a controller to receive a signal from the pressure transducer and generate a controller signal corresponding to a valve position required to maintain the flow of gas to the header to maintain the selected pressure and a position control device to receive the controller signal and an electronic position feedback signal from the actuator to indicate the position of the valve with a comparator to compare the valve position signal with the controller signal and an operator to operate the actuator to move the valve in a direction to the position where the position feedback signal corresponds to the controller signal.
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