Question: For the unit step response shown in figure estimate the following models using graphical methods: (a) First-order-plus-time-delay. (b) Second-order using Smiths method and nonlinear regression.

For the unit step response shown in figure estimate the following models using graphical methods:

(a) First-order-plus-time-delay.

(b) Second-order using Smith’s method and nonlinear regression.

Plot all three predicted model responses on the same graph

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