Question: For the process described by the transfer function (a) Find two second-order-plus-time-delay models that approximate G(s) and are of the form One of the approximate

For the process described by the transfer function

(a) Find two second-order-plus-time-delay models that approximate G(s) and are of the form

12 (&r + 1)(2s + 1)(0.4s + 1)(0.1s + 1) G(s) Ke

One of the approximate models can be found by using the method discussed in Section 6.3; the other, by visual inspection of the frequency responses of G and G.

(b) Compare all three models (exact and approximate) in the frequency domain and also by plotting their impulseresponses.

12 (&r + 1)(2s + 1)(0.4s + 1)(0.1s + 1) G(s) Ke es (TIs + 1)(725 + 1)

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