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Signal Simulink from / to Workspace

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Hello, I have this variable called SigData in the workspace that I send to Simulink to the transfer fuction block
My problem is, if I change the cycle of the input to more than one:
I have the following error in Simulink:
clear all
Heart_Rate = 72; % Heart rate [beats/min]
Duty = 2/5; % Fraction of period occupied by systole
T = 60/Heart_Rate; % Heart period [s]
Time_Systole = Duty*T; % Time occupied by systole [s]
Time_Diastole = T - Time_Systole;
Max_Flow = 500; %[m^3/s] = 4.98 l/min
Number_Cycles = 1;
r = 0.05;
C = 1.0666;
R = 0.9;
L = 0.0051;
Q = zeros(Number_Cycles * (int16 (round(T,3)/0.001)), 1);
aux=1;
for i = 1:Number_Cycles
for t = 0.001:0.001:round(T,3)
if (t <= Time_Systole)
SigData(aux,1) = t;
Q(aux) = Max_Flow*(sin((pi*t)/Time_Systole))^2;
SigData(aux,2)= Q(aux);
end
if (t > Time_Systole)
SigData(aux,1)=t;
Q(aux,2)=0;
SigData(aux,2)=Q(aux);
end
aux=aux+1;
end
end

Accepted Answer

Fangjun Jiang
Fangjun Jiang on 25 May 2021
The data in the first column of SigData is the time (or time step) info. It must be incremental (or non-descreasing).
Based on your code, when there is more than one cycle, the time step is constructed as 0.001 to 3, and then 0.001 to 3 again and then 0.001 to 3 again.
Change this line
SigData(aux,1) = t
to SigData(aux,1) = t+(i-1)*round(T,3)
  2 Comments
Fangjun Jiang
Fangjun Jiang on 26 May 2021
Use "To Workspace" block

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