斜坡信号 essn=lim SEn(S) sS"W2(s) N(s) s→>0 s+ KK2WI(s)W2(s) n()=N0,N(s)= s SK2W2(S) NO NO ssn lim SE(S) s->0 S+K,,(sw2(s)s 阶跃信号 s K2W2(s) NO NO n()=N0,N(s) essn=lim SEn(S)=- 0 S+Kk2WI(sw2(s)s KI 斜坡信号 lim SEn(S) s K2W2(s No S→ S+KiK2W(sW2(s)s 1010 1 = 0 ,  2 = 1 斜坡信号 20 0 ( ) , ( ) sN n t = N t N s = 10 20 1 2 1 2 2 2 0 ( ) ( ) ( ) lim ( ) KN sN s K K W s W s s sK W s e sE s n s ssn = − + = = − → ( ) ( ) ( ) ( ) lim ( ) 1 2 1 2 2 0 1 N s s K K W s W s ss W s e sE s n s ssn + = = − →   1 0 0 1 2 1 2 2 2 0 ( ) ( ) ( ) lim ( ) KN sN s K K W s W s s K W s e sE s n s ssn = − + = = − → 阶跃信号 sN n t N N s 0 0 ( ) = , ( ) = 斜坡信号 =  + = = − → 20 1 2 1 2 2 2 0 ( ) ( ) ( ) lim ( ) sN s K K W s W s s K W s e sE s n s ssn