Varying input into a transfer function in simulink

I want to vary a constant inside a transfer function in simulink. For example the transfer function could be: 1/(AS+1) where A is the varying constant. Then I want it to store the ouptut of each value in an array.

I tried doing this in Matlab with the following code:

G = zeros(10,2);

for i = 1:1:10
    A = i;
    out = sim('');
    values1 = out.simout.values(:,1);
    values2 = out.simout.values(:,2);
    G = values2.*values1;
end

However, this code does not store every value of G that is calculated, and does not allow for A to be non integer values like i = 1:0.01:10.

Is there any way to do this?

Answer 1

[Paul]

Hi Jake,

It looks like you're tring to vary the value of A between runs, not during a run.

In this case, I think you want something like this:

Avals = 1:.01:10;
G = cell(numel(Avals),1);
for i = 1:numel(Avals)
    A = Avals(i);
    out = sim('');
    values1 = out.simout.values(:,1);
    values2 = out.simout.values(:,2);
    G{i} = values2.*values1;  % use a cell array here if values can have a different number of rows from one run to the next
end