Estimation of time delay time constant parameters in time, frequency, and laplace domains

Four methods are proposed for estimating the dominant time constant and dead time of a given process from a knowledge of its moments, s‐plane, frequency or transient response data. The methods are faster and simpler and, in terms of accuracy and reliabiltiy, are comparable to the time domain least squares procedure for parameter estimation. Applications of the methods are illustrated with the aid of a dispersion model. A comparison is also made with other known techniques to demonstrate the superiority of the suggested methods. Copyright © 1978 Canadian Society for Chemical Engineering