試題詳解

7. Consider the closed-loop feedback control architecture shown in Fig. 2, where P(s) is the open-loop plant, C₁(s) and C₂(s) are the feedback controllers, and H(s) is the transfer function from the reference r(t) to the output y(t), respectively. Assume thatand H(s) is asymptotically stable, which of the following reference signal r(t) can be tracked by Hr(s without steady-state error?

(A) r(t) =sin(10t).
(B) r(t) = sin(20πt).
(C) r(t) = sin(0.1t).
(D)r(t)=sin(0.2πt).
(E) A 100 Hz triangular wave reference r(t).