For the control system shown in Fig. P 3. 23: (a) draw a Bode diagram of the

Question:

For the control system shown in Fig. P 3. 23:

(a) draw a Bode diagram of the open-loop transfer function

(b) find the value of the gain $K$ such that the phase margin is $50^{\circ}$

(c) find the gain margin of the system with the gain obtained in (b).

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Fig. P 3. 23

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