Question

Ex. 445. G(s)=k(s+7)/(s(s+12)(s+17)) is the FTF of a unity- feedback closed-loop system. Sketch the root locus with respect to k. Determine the number of asymptotes, N. Determine the angle, A, in degrees between the asymptotes. Determine the angles, [B,C], in degrees of the asymptotes (let B<C). Asymptote angles: -180<angle<0 and 0<angle<=180 Determine the asymptote centroid, s=D. Answers: N,A,B,C, and D. ans:5

Answer #1

Sketch the root locus of the given unity feedback system G(s) =
(s+1)/(s^(2) (s-1)) show Ga and Oa on the plot

For the standard negative feedback loop P(s) = 1/(s+1), C(s) =
K, F(s) = 1 unity feedback, For the standard negative feedback loop
P(s) = 1/(s+1), C(s) = K, F(s) = 1 unity feedback, is it possible
to tune the controller gain K so that the steady-state error e to
step input disturbances DX is 0?
Always.
Never.
Yes, when K > 0.
Yes, when K > 1.
None of the above.
Yes, when K > 0. is WRONG

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