MATLAB: How to stop a signal after a fixed time and let the simulation continue

signalsimulink

Hi,

I have a fairly simple problem. Consider I have two signals: a sine wave and a step function. If my simulation time is 100 seconds, how do I get the input signal to be the sine wave for the first 50 seconds and then switch to the step function for the final 50 seconds?

Best Answer

Use a Switch block: https://www.mathworks.com/help/simulink/slref/switch.html

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MATLAB: How to temporarily stop a script, extract data, and then continue

What about storing the values in vectors? Then there is no need to stop the loop:

n = length(A);
P_in = zeros(1, n);  % Pre-allocate
z_in = zeros(1, n);
D_in = zeros(1, n);
inlet_i = 0;
for i = 1:2:n-1
  line_desc = A{i};
  line_data = str2num(A{i+1}); 
    switch line_desc
    case 'inlet'
      inlet_i       = inlet_i + 1;
      P_in(inlet_i) = line_data(1);
      z_in(inlet_i) = line_data(2);
      D_in(inlet_i) = line_data(3);
    case ...  same for the other variables
  end
P_in = P_in(1:inlet_i);  % Crop unused elements
z_in = z_in(1:inlet_i);
D_in = D_in(1:inlet_i);

Stopping scripts to manipulate the data is "meta-programming" and in consequence prone to errors and hard to debug.

Best Answer

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