Problem 예제.

Multiple Choice • Views 698 • Comments 0 • Last Updated at 1 month ago

어떤 제어계의 출력이 $C(s)=\dfrac{s+0.5}{s(s^2+s+2)}$ 로 주어질 때 정상값은?

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0.5

0.25

Solution

$\lim_{t \to \infty} c(t) = \lim_{s \to 0} s C(s)$

$\lim_{t \to \infty} c(t) = \lim_{s \to 0} s \dfrac{s+0.5}{s(s^2+s+2)} = \dfrac{1}{4}=0.25$

Correct answer: 4