Time-lag in a control system—II
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Abstract
Abstract In a previous paper (Callender, Hartree and Porter 1936), three of the present authors have given a theoretical study of the effect of a time-lag on a general class of control systems. It was supposed that some physical quantity (such as temperature), subject to random disturbances, was to be kept as nearly constant as possible by the operation of certain controlling gear, this operation being related in a definite way to the behaviour of the physical quantity to be controlled, and further that there was a time-lag between such operation of the controlling gear and its consequent effect upon the behaviour of that quantity.