bF(s)含有共扼复数极点时,可展开为 a1 s+a2 a … (s+p1)(s+p2)s+p3 st p B(s La, s+a2lsa-pL A(s) (s+p1)S+p2) S=-P1 CF(S)含有多重极点时,可展开为 b 、b s+P1)(s+P1) (s+P1)(s+p) (S+p B(s bn=[(s+p1) B(S P1 1(s+p1)]}=-pn ds A(S) d' bo i de[de(s+ p )bs-pl 1 B(s) A( (r-1)!ds=A(s) (s+P)1}=a 其余各极点的留数确定方法与上同。 55 b.F(s)含有共扼复数极点时，可展开为 n n s p a s p a s p s p a s a F s + +  + + + + + + = 3 3 1 2 1 2 ( )( ) ( ) 1 1 ( )( )] ( ) ( ) [ ] [ 1 2 s p 1 p2 s p s p s A s B s a s + a =− = + + =− c.F(s)含有多重极点时，可展开为 ( ) ( ) ( ) ( ) ( ) ( ) 1 1 1 1 1 1 1 1 n n r r r r r r s p a s p a s p b s p b s p b F s + +  + + + + +  + + + + = + + − − 1 ( ) ] ( ) ( ) [ 1 s p r r s p A s B s b = + =− 1 1 1 ( ) ]} ( ) ( ) { [ s p r r s p A s B s ds d b − = + =− 1 1 ( ) ]} ( ) ( ) { [ ! 1 s p r j j r j s p A s B s ds d j b − = + =− 1 ( ) ]} ( ) ( ) { [ ( 1)! 1 1 1 1 1 s p r r r s p A s B s ds d r b − =− − + − = 其余各极点的留数确定方法与上同