Some design criteria for automatic controls

Abstract

THE EARLIEST, and most direct, method of analyzing automatic control systems is based on the solution of the differential equations of the system for some initial disturbance. This transient analysis is general and, seemingly, may be applied to any problem which can be formulated in differential equations. However, even with the aid of the powerful methods of the Laplace transformation, synthesis of a complex control is largely a cut-and-try process.