例:求图示低通滤波器在阶跃信号和正弦信号时的输出信号特征 L=1H.C=1F,R=192 解:网络函数 C1(S) C × (SL+R) sl+ SC SL+—+R SC U2(s)=R1(s) RU(S) SL+oc+R SLSC(SL++r)+(SL+R) SC SC H(S)=a3<2⊥s +s S+1
L H C F R = = = 1 , 1 , 1 . 1 1 ( ) ( ) 1 ( ) 1 U S I s SL R SC SL SL R SC = + + + + 1 1 2 1 ( ) ( ) ( ) 1 ( ) ( ) 1 SC RU I s S U s R SLSC SL R SL R S SL R SC C = = + + + + + + 3 2 1 ( ) 2 1 H S S S S = + + + 例：求图示低通滤波器在阶跃信号和正弦信号时的输出信号特征. 解： 1 U t( ) R L L C 2 U t( ) i 1 i 2 网络函数
Untitled* ×|[ ock Parameters: Transfer F File Edit View Simulation Format Tools Help Transfer Fcn 口固舀影≌xma Matrix expression for numerator, vector expression for denominator. Output width equals the number of rows in the numerator. Coefficients are for descending powers of s Parameters Numerator +2+2s+1 s Transfer Fcn Denominator 121] Absolute tolerance auto ancel Help F100% Apply H(S)= S3+S2+2S+1 份母 分子 网络函数的分子分 母多项式系数写入模块
网络函数的分子分 母多项式系数写入模块 . 分母 分子 3 2 1 ( ) 2 1 H S S S S = + + +
仿真结果 .scope 舀自③A暍 08 02 ime offset: 0 Time offset: 0 scope 舀自A幽昌日 舀自0PA居日 05 ime offset: 0 Time offset: 0
仿真结果: