Abstract
In this paper the authors report on a practical application of the quantitative methods which they have described previously (2, 6) in connection with process and control analysis. First, the properties of surge vessels are considered from a functional point of view. The influence on these properties of externally applied controls is next discussed. Proceeding from the simpler to the more involved, control systems of various types are introduced and applied to a vessel. The performance of each of these applied systems is separately examined and illustrated under significant assumed conditions. Considerable attention is given to a definite method of control which involves, as the master instrument, one having a proportional-plus-floating characteristic, and which, it is felt, may justifiably be referred to as “automatic averaging control.”
