20 巻 (1954) 90 号 p. 109-110
Indicial response and frequency response are the most important backbone in discussing automatic controls and servomechanisms. Especially, the relations between the both responses are critical. Though there have been several important contributions to obtain frequency response from indicial response, the author suggests a simpler method to get frequency response from indicial response. The author separated the indicial response into two parts at the inflection point, and approximated them by the two known curves and obtained frequency response by adding their frequency components.