MATLAB 中如何使用符号数学工具箱(Symbolic Math Toolbox)来求解任意 RLC 电路的传递函数?

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我有一个RLC电路,基尔霍夫方程是:
I1 = V1/R2;
I2 = (V2 - V1)/(L*s + R1);
I3 = (V2 - V1)*s*C;
I1 = I2 + I3;
我该如何用符号数学工具箱来求得V1到V2的传递函数?

Accepted Answer

MathWorks Support Team
MathWorks Support Team on 7 Nov 2019
参考代码如下:
>> syms R1 R2 L C V2 V1 s;
>> eqns = [V1/R2 == (V2 - V1)/(L*s + R1) + (V2 - V1)*s*C]; % s域中的方程 I1 = I2 + I3
>> V2tmp = solve(eqns, V2); % 将V2求出来给V2tmp
>> TF = simplify(V2tmp/V1) % 求传递函数,并化简

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