2.如果C1(s)含有r对共轭复极点P12=ak±jB, C(s)= N1(s) ∏【-a4-jBs-a4+j)N2(s) ∑|K e +C2(s) s-a -jB s-a +jB K lim(s-a;)C(s) S→>;+1 2 ( ) i i r j j i i ii ii C s e e K s js j θ θ αβ αβ − = ⎛ ⎞ ⎜ ⎟ + −− − + ⎝ ⎠ + = ∑ 2. 如果 含有r对共轭复极点 ， 则 1 C s( ) lim ( ) ( ) i i i j i i i s j K e s j C s θ α β α β → + = −− 1 1 1 1 2 1 ( ) ( ) ( ) ( ) [( )( )] ( ) r kk kk k M s M s C s N s s j s j Ns αβ αβ = = = ∏ −− −+ 1,2 j k k p =α ± β