Simulation of digital control systems on an analog computer with digital logic

A procedure for simulation of digital control systems is described which uses a simple hybrid arrangement consisting of the conventional elements of an analog computer and the digital elements normally provided in the digital panel available as an accessory from most analog computer manufactures. The method is developed from the basic principles of the z-transform and the zero-order hold, and applied to the synthesis of suitable software compensation for a variety of control problems including some with non-uniform sampling characteristics. ln each case, the response of the simulated system is compared with a calculated response to confirm the accuracy and validity of the simulation.NRC publication: Ye