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Problem 6.18PP
(a) Sketch the Nyquist plot for an open-loop system with transfer function 1/s2; that is. sketch
s=Cx
where C1 is a contour enclosing the entire RHP. as shown in Fig. 1. {Hint Assume Cl takes s 
small detour around the poles at s = 0. as shown in Fig. 2)
(b) Repeat part (a) for an open-loop system whose transfer function is
Figure 1 An s-piane plot of a contourCI that encircles the entire RHP 
Figure 1 An s-piane plot of a contourCI that encircles the entire RHP
c, /
V
Figure 2C1 contour enclosing the RHP for the system
Step-by-step solution
step 1 of 3
M oping imaginadty axis ( 0