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Design a proportional controller (i.e. find K) for the shown system in order to have a damping ratio: zeta=0.4
U(s)
1
Y(s)
K
s?+ 2s + 4
Select one:
O a. 2.25
O b. 1.0
О с. 2.0
O d. 8.25
e. 4.25

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