例7:RC电路 (1)=R(t)+()dh v2(t)=(0 图2.13RC网络 进行 Laplace变换 n1(s)=(R+1()p2(s)=l(s 时间常数 S (1/z) 2(s)= S T(S VI(s) RCS +1 IS +1 5+1/ R Cs MODERN CONTROL SYSTEMMODERN CONTROL SYSTEM 2 例 7：RC电路 图2.13 RC网络 ( ) 1 ( ) 1 I s Cs V s R       = +       = Cs V s I s 1 ( ) ( ) 2    1/ (1/ ) 1 1 1 1 ( ) ( ) ( ) 1 2 + = + = + = = V s RCs s s V s G s  = + t i t dt C v t Ri t 0 1 ( ) 1 ( ) ( )  = t i t dt C v t 0 2 ( ) 1 ( ) 进行Laplace变换 Cs R V s Cs V s 1 ( ) 1 ( ) 1 2 + =  时间常数