Hi all,
I am having a very simple simulink simulation which I would like to run and compare results for different values of gain, as you can see in the image attached.
I can run it very easily for any desired value of gain in the blocks Ka, Kv and Kp and confirm the results.
I now desire to run the simulation programmatically through a for loop to test its response for different values of Ka, Kv and Kp i.e. 0.5, 0.1, 1.5. This is something that I have achieved by running the command ''sim'' and setting my desired values of gain through the command set_param for each of the desired blocks. For the case of changing the gain in Ka for example:
GVec = [1.5,1,0.5] ;
GName = 'Ka' ;
for i = 1:length(GVec)
SimOut = sim('DCQ2','ReturnWorkspaceOutputs','on') ;
set_param('DCQ2/Kp','Gain','1')
set_param('DCQ2/Kv','Gain','1')
set_param(strcat('DCQ2/',GName),'Gain', num2str(GVec(i)))
x = SimOut.get('tout') ;
y = SimOut.get('simout') ;
hold on
plot(x,y)
grid on
LegStr(i) = {sprintf('Ka Gain: %.1f', GVec(i))} ;
end
legend(LegStr,'Location','SE') ;
title('Electronic Servo Valve Response')
xlabel('Time (s)')
ylabel('Valve Position (m)')
set(gca,'FontSize',14)
The problem with this is that for some reason, somewhere along this process something goes wrong, such that the output figure's plotted lines do not correspond to the correct legend key. This happens in a non-systematic way, which leads me to believe that there might be a problem associated with the whole approach itself rather than the plotting.
In addition when running all 3 gain blocks in the same loop, the outputs are clearly unrealistic. I struggle to find where the interference might be in my code.
Thanks for your help anyway.
KR,
KMT.
