Question 1
Consider the above closed loop system in Figure 1.
Figure 1
a) Sketch the Bode plot of the transfer function πΊ(π ). (4 Points)
b) Sketch the Nyquist plot based on (a). (4 Points)
c) Using Nyquist stability criterion to determine all values of the feedback gain K that stabilizes the
closed-loop system. (6 Points)
Question 2
Consider the closed loop system in Figure 2.
Figure 2.
Determine the critical value of K for stability using the Nyquist stability criterion.
(6 Points)
