输出相量为: U2(jo)=U1(jo).H(jo)=U2(jo))elo(o) 稳态响应为 l2(t=U2(99)co(991+(9)+U2(9)cos(1001+(100) +|U2(101)cos(101tp(101)• 稳态响应为 | (101)| cos(101 (101)) ( ) | (99)| cos(99 (99)) | (99)| cos(100 (100)) 2 2 2 2    + + = + + + U t u t U t U t 输出相量为： ( ) 2 ( ) 1( ) ( ) | 2 ( )|       j U j U j H j U j e • • • = • =