G(SFRCS/(LCS S+RCS+1) G(SFP(RICS+1)/(CRIS B+1) B=R2/(R+R2) R1 U U Uc R2/R1(R1CS+1) I/RICS) R1 L Y C R2 U R2 R1+R R21 R1R2C+L-S+1 R1+R2 R1+R2 化简方框图,求传递函数 R(S) C(S) 921248314 G1G2G 3G4 1+G1G2G3G4H1+G2G3H2+G3G4H3 H3 C(S) G1G2G3G4 1+G1G2G3G4+G2G3+G1G2+G3G4G(S)=RCS/(LCS*S+RCS+1) G(S)=β(R1CS+1)/ (CR1Sβ+1) β=R2/(R1+R2 ) -R2/[R1(R1CS+1)] -1/(R1CS) 2．化简方框图，求传递函数