二、电路元件的运算模型(VCR关系) R: I(S)R 0 U(S)-RI(S) U(S) Li(0-) L: U(S)月sdI(S)-Li0-) U(S) u(0-)/S I(S 。Us)s+u0 U(S R,sL,I -一一一R、L、C运算阻抗 Ҽǃ⭥䐟ݳԦⲴ䘀㇇⁑ර(VCRޣ㌫) I(S) sL + U(S) - - + Li(0-) I(S) + U(S) u(0-)/S 1 sC + – – I(S) R + U(S) - R: L: C: U(S)= R I(S) U(S)= sL I(S)–Li(0-) U(S)= I(S)+ 1 sC u(0-) s 1 R,sL, sC ˉˉˉˉRǃLǃC䘀㇇䱫ᣇ