杨平《自动控制原理》附加例题
k3 k1 k2 k4 解：F(s) = + + + s +1+ j s +1 j s + 2 s + 4 B(s) k1 = (s + 1 + A(s) j) = 4 + 3j s = 1 j
B(s) k2 = (s + 1 j) = 4 3j A(s) s = 1+ j B(s) k3 = (s + 2) = -5 A (s) s = 2 B(s) k3 = (s + 4) = -3 A (s) s = 4 4 + 3j 4 - 3j 5 3 F(s) = + s +1+ j s +1 j s + 2 s + 4