Normalizing/transforming/reshaping the output signal in simulink so that it is build only of connected spiking values

0
votes

I have a system build in simulink and the output of the system. The output has valuable data points in the peaks/spikes and other, not valuable data points at magnitude of 70.

What I am struggling to achieve is the output signal, consisting only of the valuable data points connected with each other straightforward(basically, these are the datapoints I need).

I attached the picture with the original output signal from the scope and the one I built from it in matlab after extracting the original as a structure with time into workspace.

Output in the scope

After processing the signal from the scope in matlab

Here is the code I use to process and plot it:

ab = [];
a = [];
for i=1:numel(Tc.signals.values)
    if Tc.signals.values(i)<70
        ab = [ab;Tc.signals.values(i)];
        a = [a;Tc.time(i)];
    end
end
plot(a, ab, '-k', 'LineWidth', 1);
grid on;

My question is what blocks and how should I add so that the output is transformed during the simulation into what I ploted outside the simulation from matlab? I really have difficulties finding a good solution... :(

Thank you very much in advance!

1
matlabextractnormalizationsimulink
If I understand correctly your question, than I think you can't. The slope of your interpolation depends on the next spike, and you (probably) don't know its magnitude in advance. That graph can be built only in postprocessing. – Matteo Ragni
there is no data in the slopes, there are only points on 'top' of the spikes and points at 70... Idealy I just want a signal over the same time consisting of connected spikes points though... The spikes are creaded with a use of delay in integrator reset loop (i.e. I do not eliminate the signal for the delay time... a bit difficult to explain tbh).. So the point is that I can 'say' "this is a spike" during the simulation using another signal.. – Serchy
*signals.. time and magnitude – Serchy
This can't be done. As per Matteo's comment: Assume the current time is 1 (or 10 or 50) time periods after the first spike. Since Simulink doesn't know when, or what value, the second spike will have, how can it draw a (correctly sloped) line from the first spike to the current time period? – Phil Goddard

1 Answers

0
votes

Code the if statement you show using a switch block, trigger using a logical <70, if false loop last output back using zero hold, you will still get output each time step but it will just be the last point you caught. I assume this is a discrete sim with output set to hold.