Error: The "A" matrix must be a numeric array with no Inf's or NaN's.

Question

Joseph 2024-5-10

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2117361-error-the-a-matrix-must-be-a-numeric-array-with-no-inf-s-or-nan-s

评论： Joseph 2024-5-13

coder.extrinsic("testcon2dis")
I_2 = eye(2);
O_2 = zeros(2);
Ac_xy = [O_2 -(1/Lfilter)*I_2 O_2; (1/Cfilter)*I_2 O_2 -(1/Cfilter)*I_2; O_2 O_2 w* J];
Bc_xy = [(Vdc/Lfilter)*I_2 O_2 O_2]' * Tr;
Cxy = [I_2 O_2 O_2; O_2 I_2 O_2];
[A, B] = testcon2dis(Ac_xy, Bc_xy, Cxy, Ts);
%%%%%%%%%%%%%%%% Below is the testcon2dis%%%%%%%%%%%%%%%%
function[A,B] = testcon2dis(Ac_xy,Bc_xy,Cxy,Ts)
ct_sys = ss(Ac_xy,Bc_xy,Cxy,[]);
dt_sys = c2d(ct_sys,Ts);
A = dt_sys.a;
B = dt_sys.b;
end  

%%%%%%%%%%%%%%%%%%%%%%% Error message

Error:The "A" matrix must be a numeric array with no Inf's or NaN's.

Error in ss.ss.m (line 290)

throw(ME)

Error in testcon2dis.m (line 2)

Error in 'MPC_3Phase_Inverter/MATLAB Function1' (line 31)

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Any suggestions I tried calling the A marix as a double or zeros to give it sizes but still got new errors doesn't work(this block of code is used in a matlab function block simulink)

%%%%%%%%%%%%%%%%%%%%% Error message calling A as a double or zeros(6,6)%%%%%%%%%%%%%%%

Warning: Matrix is singular, close to singular or badly scaled. Results may be inaccurate. RCOND = NaN.

> In MPC_Matrices_l (line 69)

Error:Matrix must be positive definite.

Error in MPC_Matrices_l.m (line 70)

Hinv=chol(W_inv);

Error in 'MPC_3Phase_Inverter/MATLAB Function1' (line 43)

Any suggestions thank you

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Sam Chak 2024-5-11

编辑：Sam Chak 2024-5-11

在 MATLAB Online 中打开

Code looks okay. Check other parameters that are not shown.

%% parameters
I_2     = eye(2);
O_2     = zeros(2);
Lfilter = 1;            % not shown
Cfilter = 1;            % not shown
w       = 1;            % not shown
J       = eye(2);       % not shown
Tr      = 1;            % not shown
Vdc     = 1;            % not shown
%% state-space matrices
Ac_xy   = [O_2 -(1/Lfilter)*I_2 O_2; (1/Cfilter)*I_2 O_2 -(1/Cfilter)*I_2; O_2 O_2 w* J];
Bc_xy   = [(Vdc/Lfilter)*I_2 O_2 O_2]'*Tr;
Cxy     = [I_2 O_2 O_2; O_2 I_2 O_2];
Ts      = 0.1;
%% Test function
[A, B]  = testcon2dis(Ac_xy, Bc_xy, Cxy, Ts)
A = 6x6
    0.9950         0   -0.0998         0    0.0052         0
         0    0.9950         0   -0.0998         0    0.0052
    0.0998         0    0.9950         0   -0.1050         0
         0    0.0998         0    0.9950         0   -0.1050
         0         0         0         0    1.1052         0
         0         0         0         0         0    1.1052
<mw-icon class=""></mw-icon>
<mw-icon class=""></mw-icon>
B = 6x2
    0.0998         0
         0    0.0998
    0.0050         0
         0    0.0050
         0         0
         0         0
<mw-icon class=""></mw-icon>
<mw-icon class=""></mw-icon>
function [A, B] = testcon2dis(Ac_xy, Bc_xy, Cxy, Ts)
    ct_sys  = ss(Ac_xy,Bc_xy,Cxy,[]);
    dt_sys  = c2d(ct_sys,Ts);
    A       = dt_sys.a;
    B       = dt_sys.b;
end 

Joseph 2024-5-13

Thank your the comment, I realise the error message genrated by the matlab didnt point exactly to the error. I realise the issue is with the AC_xy matrix which from the other sugegstion I was told to use the isany nan command to resolve it.

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