Mathematical models for computer control systems

Mathematical models are often needed for design and justification of computer control systems prior to installation. They may also become an integral part of the control system itself, providing a means for rapid and periodic determination of the best operating conditions. Using fundamental physical and chemical principles, relationships are written to describe typical process operations. Both steady-state and dynamic models are considered. By means of "constants" which will be modified by the control computer, the models can accommodate slow and minor changes arising from variables whose effects are poorly understood. Some applications of the models are mentioned. This paper is to be published in the Proceedings of the First IFAC Moscow Congress by Butterworth Scientific Publications in 1960.