uc =e-[A cos@t+Bsin@t] 由初始条件 duc=-SeAcos@t+Bsin uc(0)=U,→A=Uo dt +e'[-@Asin@t+@Bcos@t] e(0*)=0→-6A+0B=0 dt A=t,B=8U。 uc =e 5U(cos@t+sin@t) 0 sinot) 00 @e-5sim(@t+B)
(0 ) 0 A B 0 d d = → − + = + t uC 由初始条件 0 A 0 uC (0 ) = U → = U + u e [Acos t Bsin t] t C = + − A U0 B U0 = = (cos sin ) 0 u e U t t t C = + − sin( ) 0 0 = + − U e t t [ A in B os ] [Acos Bsin ] d d e s t c t e t t t u t C t + − + = − + − − 或 ( cos sin ) 0 0 0 0 u e U t t t C = + −
uc =Ue-5'(cos@t+sin@t) 0 i=-C=(CCoWesimot dt 0 1 (LC8+LCoesint @ 1 = (LCa)Ue 'sin@t ⊙L 1 Ue sin@t OL uL=L diIU(-e sim +@ecos) dt o cos@t) 0 00 00 @Ue-5 sin(@t-B) 0
(cos sin ) 0 u U e t t t C = + − U e t L LC U e t L LC LC U e t L C C U e t t u i C t t t C t sin 1 ( ) sin 1 ( ) sin 1 ( ) sin d d 0 0 2 0 0 2 2 0 2 − − − − = = = + = − = + sin( ) ( sin cos ) ( sin cos ) 1 d d 0 0 0 0 0 0 0 = − − = − − = = − + − − − − U e t U e t t U e t e t t i u L t t t t L