抄録
In this paper method and formulas are given for deciding a 3 rd-order transfer function from the values of five points of a transient response x (t) which is started from a steady state and ended on thsame steady state. The impulsive response of the system having this calculated 3rd-order transfer function coincides with x (t0), x (t0), x (t0+γt0), x (t0+2γt0), x (t0+3γt0) of the transient response. This method may be applicable to decide the transfer function of a element of a automatic control system by taking the ratio of 3 rd-order transfer function.
