数字式アナログ計算機とその応用

抄録

This article describes the “Digitalized Analog Computer” which presents same characteristics as those of the analog computer only by digigital operation. It can be used for real time control of high accuracy.This computer, a sort of digital differential analyzer, consists of operational units each of which has registers to run parallel operation and can make high-speed computation. A model computer DAC-I made for trial consists of five integrators and other sorts of five operational elements. In this computer, the clock frequency is 100 kcps and one word is composed of 20 bits. A circle test shows that it can generate stabilized sinusoidal waves of 50 cps. As integration is done not only with time but with variables voluntarily selected in each of integrators, considerably complex problems can be solved with a small number of operation' units. Several examples of computation are given, too.