A general technique for approximating transient response from frequency response asymptotes

ALTHOUGH feedback control design is generally performed in terms of frequency response, dynamic behavior is best expressed in terms of transient response. Consequently it is very desirable to be able to relate transient and frequency response in a simple manner. This paper presents, as a means for doing this, a reliable approximation procedure, which enables one to relate by inspection the characteristics of the frequency response to the corresponding characteristics of the transient responses.