PID and Process Gain

House, John M.
October 2004
Heating/Piping/Air Conditioning Engineering;Oct2004 Supplement, Vol. 76, p30
Deals with the factors which affect the stability of proportional-integral-derivative control loops. Illustration of a control loop for a chilled-water valve; Analysis of the process-gain dependency on valve position; Calculation of mixing-box process-gain dependency on outdoor-air temperature.


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