Programatically changing block parameter during simulation.
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I am automatically changing the amplitude value of my sin wave block in my model. But the problem is that my program runs the simulation multiple times and do not change the values of amplitude during one simulation. this is the code:
amplitude_vec=(0.5:0.2:2.3);
for i=1:10
amplitude=amplitude_vec(i);
sim('Amplifier.mdl');
end;
How do i write a program that will change the values of amplitude of my sin wave block in one simulation run ?
Thanks for your help,
Janez
2 Commenti
Risposta accettata
Azzi Abdelmalek
il 25 Ago 2012
Modificato: Azzi Abdelmalek
il 26 Ago 2012
amplitude_vec=(0.5:0.2:2.3);
for k=1:10
amplitude=amplitude_vec(k);
set_param('Amplifier/Sine Wave','Amplitude',num2str(amplitude))
%check if "Sine Wave" is the name of your sine block, if not, replace it
sim('Amplifier');
end;
or you can use (you don't need to pause simulation)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/171740/image.gif)
- the below code allows to create a signal with multiple amplitude saved in "file.mat"
- you set sine amplitude to 1
amplitude_vec=(0.5:0.2:2.3);
t0=0;tf=5;te=0.1;
tf1=tf;t=[];amp=[];
for k=1:length(amplitude_vec)
t1=t0:te:tf;
t=[t t1 ];
amp=[ amp amplitude_vec(k)*ones(1,length(t1))];
t0=tf+te;tf=t0+tf1
end
close;plot(t,amp);
ty=[t;amp];
save file ty
2 Commenti
Azzi Abdelmalek
il 26 Ago 2012
Modificato: Azzi Abdelmalek
il 26 Ago 2012
you can use the "assertion" block to pause your simulation
Più risposte (1)
Mariano Lizarraga
il 25 Ago 2012
Modificato: Mariano Lizarraga
il 25 Ago 2012
I might be misunderstanding your problem statement but if you only want to change the amplitude base on the time of the simualtion then you could do an embedded matlab function as follows:
function y = timeDependentSine(t, amplitude, freq, phase, bias)
y = amplitude*sin(freq*t + phase) + bias;
and now all the parameters for the sine function can be time varying if you so desire. You can implement all in Simulink as shown here: http://skit.ch/nwn1
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