Question 5 (30 marks) Consider the transfer function (8-8) G(s) = (s + 2)2 (a) Draw the Nyquist contour which would be a

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Question 5 30 Marks Consider The Transfer Function 8 8 G S S 2 2 A Draw The Nyquist Contour Which Would Be A 1 (43.19 KiB) Viewed 8 times

Question 5 (30 marks) Consider the transfer function (8-8) G(s) = (s + 2)2 (a) Draw the Nyquist contour which would be appropriate for this system. (2 marks) (b) The image of the Nyquist contour for the transfer function G(s) is shown in Figure Q5b. De Figure 05b: Image of the Nyquist contour Show that the two points of intersection with the real axis associated with finite frequencies are given by 2 and 1/4. (8 marks) (c) Calculate, using the Nyquist Stability Criterion, the range of values of k for which the closed loop system given in Figure 5c is stable, G Figure 050: Feedback Loop