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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)

2008-04-18, 20:37	#1
大哥救命啊初级会员注册日期: 2008-04-18 年龄: 56 帖子: 1 声望力: 0	[求助]以知方程组，求解（好难，求助） 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)