课堂练习 试绘制下列代数方程的信号流图。 (1) (2) x2 =ax1 +ix3 +jx6 x2=ax+gx2+Jx3 x3 =bx2 X3=bx2+X3 X4=f1+cx3-gx5 X4=f1+cx2-gx3 x5 dx4 xs dx4 x6=exs X6=X5课堂练习 试绘制下列代数方程的信号流图。 ⑴ ⑵ ⎪⎪⎪⎩ ⎪⎪⎪⎨⎧ = = −+= = ++= x 56 45 5314 23 6312 exx dxx gxcxfx bxx jxixaxx ⎪⎪⎪⎩ ⎪⎪⎪⎨⎧ = = −+= += ++= x x 56 45 3214 323 3212 xx dxx gxcxfx bxx jxgxaxx