giving state-space equation from transfer function G(s)

Question

behnam 2012-6-13

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/41027-giving-state-space-equation-from-transfer-function-g-s

we have transfer function G(s) as follow :

http://up.liz.ir/files/Gs.png

i want to give state-space equation from G(s). i search about it and found that is ss order that do it, and i writem-file as follow , but matlab say :"Empty state-space model"

    H = [tf([2],[1 4 1])];
    ss(H);
    ss(1);
    ss(2);

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Thomas 2012-6-13

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/41027-giving-state-space-equation-from-transfer-function-g-s#answer_50657

在 MATLAB Online 中打开

>>  H = [tf([2],[1 4 1])]
H =
          2
    -------------
    s^2 + 4 s + 1
Continuous-time transfer function.
>> ss(H)
ans =
    a = 
         x1  x2
     x1  -4  -1
     x2   1   0
    b = 
         u1
     x1   2
     x2   0
    c = 
         x1  x2
     y1   0   1
    d = 
         u1
     y1   0
Continuous-time state-space model.
>> ss(1)
ans =
    d = 
         u1
     y1   1
Static gain.
>> ss(2)
ans =
    d = 
         u1
     y1   2
Static gain.