Example K dx 4=K, dt M F=K i 0000n X(s) Ki U.(s) (Ms2+Bs+K)(RLCs2+Ls+R)+KK,(RCs+1)s 日96Example Ms Bs K RLCs Ls R K K RCs s K U s X s f u f r ( ) ( )( ) ( 1) ( ) 2 2        b u dx u K dt  F Ki  f