第二节绘制根轨迹的数学依据 开环传递函数的两 R(s E(s 种表达式 kI(x,+1) B(s) H(s G(SH(S) =1 I(r,+1) K(+=) i=1 KL(s K∏ G(SH(S) (S+p;) ∏第二节 绘制根轨迹的数学依据 ƒ 开环传递函数的两 种表达式 ∏ ∏ = = + + = n j j m i i T s k s G s H s 1 1 ( 1) ( 1) ( ) ( ) τ ( ) ( ) ( ) ( ) ( ) ( ) 1 1 J s KL s s p K s z G s H s n j j m i i = + + = ∏ ∏ = = ∏ ∏ = = = n j j m i i p K z k 1 1 (n ≥ m)