The steady state error for a unity feedback system for the input r(t) = Rt^2/2 to the system G(s) = K(s+2)/s(s3+7s2+12s) is
A. 0
B. 6R/K
C. ∞
D. 3R/K
Answer:B
The steady state error for a unity feedback system for the input r(t) = Rt^2/2 to the system G(s) = K(s+2)/s(s3+7s2+12s) is
A. 0 B. 6R/K C. ∞ D. 3R/K
Explanation: Ka = 2K/12 = K/6