Prof : AZIZ HALIBPage 453102 / 3103 L r R C . t =0 Cu R .. ( )t+ R=Rr . : RLC . T R L C . . : ( ) R=0,r =0 LC Cu . RLC :L C R+ + u u u =0 . Ru =R.i L+diu =ri Ldtdqi =dtCq=C.u : CRdqduu =R. =RC.dt dt| | |\ .L+dq dqdu =r Ldt dt dt | | |\ .2C C C CL2+ +du du du d udu=rC LC =rC LCdt dt dt dt dtProf : AZIZ HALIBPage 463102 / 3103 Cu :( )2C CC2+ + +d u duLC R rC u =0dt dt t+ R =R r 2C t CC21LC+ +d u Rduu =0dt L dt. : q Cu qC:2t21LC+ +d q dqRq=0dt Ldt LC C L . . t =0 . . 1 ) Cu (t) :C L+ u u=0 dqi =dtCq=C.u Cdui =C.dt | | |\ .2C CL2du d udu =L C. =LCdt dt dtC L+ u u=0 2CC2+d uLC u =0dt2CC21LC+d uu =0dt :| | |\ .C m02u (t) =U.cos t +T :mU : Cu . ( ) V .0T : 002 =T ( ) rad/ s . 001N=T ( ) Hz . : t =0 . -