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在這裏,我nonsqaure MIMO系統中的「G」具有3個輸入和輸出7:如何使用Matlab獲取非正方形mimo系統的逆函數?
A = [-6.932e-2,17.41,-36.75,0,0,0,-6.0660,-31.54,0;
-1.435e-4,2.719e-2,-1.411e-3,3.467e-1,0,-9.380e-1,7.139e-2,-1.691e-2,0;
-4.537e-4,1.870e-3,-2.025e-1,0,1,0,-4.688e-2,7.563e-3,0;
-1.304e-4,-7.179,-4.916e-1,-6.172e-1,-3.689e-2,7.631e-1,0,0,0;
2.297e-5,0,-8.667e-1,4.393e-2,-1.947e-1,-2.026e-2,0,0,0;
1.964e-5,4.263e-2,-1.329e-2,1.233e-3,1.579e-2,-1.600e-1,0,0,0;
0,0,0,1,1.941e-1,2.771e-1,0,6.258e-2,0;
0,0,0,0,8.192e-1,-5.736e-1,-5.612e-2,0,0;
0,0,0,0,6.055e-1,8.648e-1,0,2.006e-2,0]
B = [0,0,-7.560,9.067e-4;
-6.952e-3,1.293e-2,0,0;
0,0,-3.425e-2,-9.577e-7;
4.249,5.989e-1,0,0;
0,0,-1.796,0;
-7.287e-2,-2.877e-1,0,0;
0,0,0,0;
0,0,0,0;
0,0,0,0]
C = [0,-5.758e-1,0,0,0,0,0,0,0;
0,0,0,1,0,0,0,0,0;
0,0,0,0,0,1,0,0,0;
0,0,1,0,0,0,0,0,0;
0,1,0,0,0,0,0,0,0;
0,0,0,0,1,0,0,0,0;
0,2.719e-2,-1.411e-3,3.467e-1,0,-9.380e-1,7.139e-2,0,0]
D = [-1.298e-1,-1.610e-1,0,0;
0,0,0,0;
0,0,0,0;
0,0,0,0;
0,0,0,0;
0,0,0,0;
-6.952e-3,1.293e-2,0,0]
Gss = ss(A,B,C,D)
G = tf(Gss)
我試着用pinv(G)
得到G的倒數,但我得到這個錯誤:
Undefined function 'svd' for input arguments of type 'tf'.
Error in pinv (line 18)
[U,S,V] = svd(A,'econ');
我也一直在努力,G'*inv(G*G')
但結果卻是:
*GT*invGGT
ans =
From input 1 to output...
1: NaN
2: NaN
3: NaN
4: NaN
From input 2 to output...
...
靜態g^ain。*
我怎樣才能得到inv(G)
?