大哥救命啊
2008-04-18, 20:37
X1(s)=G1(s)*R(s)-G1(s)*[G7(s)-G8(s)]C(s)
X2(s)=G2(s)[X1(S)-G6(s)*X3(s)]
X3(s)=[X2(s)-C(s)*G5(s)]*G3(s)
C(s)=G4(s)X3(s)
求出C(s）/R(s)
X2(s)=G2(s)[X1(S)-G6(s)*X3(s)]
X3(s)=[X2(s)-C(s)*G5(s)]*G3(s)
C(s)=G4(s)X3(s)
求出C(s）/R(s)
查看完整版本 : [求助]以知方程组，求解（好难，求助）