The unit step input response of a certain control system is given by c – McqOptions

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1.	The unit step input response of a certain control system is given by c(t) = 1 + 0.2 e-60t – 1.2 e-10t. The undamped natural frequency ωn and damping ratio δ are, respectively
A.	24.5 and 1.27
B.	33.5 and 1.27
C.	24.5 and 1.43
D.	33.5 and 1.43
Answer» D. 33.5 and 1.43

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