matlab求传递函数问题
>> syms G1 G2 G3 G4 G5 G6 H1 H2 H3 H4 c1 c2 c3 GG>> c1=feedback(G4*G5,H3);
c2=feedback(G3*c1*G6,H4/(G5*G6));
c3=feedback(G2,H2*G3);
GG=feedback(G1*c3*c2,H1)
??? Error using ==> feedback
Not enough input arguments. 查看帮助feedback,参数是sys不是sym,不可以是符号变量!
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