Return different values from a function after certain interval
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This is a function in a simulink model that I am working on. It's output goes in a switch case to which different circuits are connected.
Context: v1,v2,v3,v4 are voltages of 4 battery cells. In step1 the function finds the index of cell having max voltage. I want the circuit associated with it to execute completely. Similarly, after this step 2 should run followed by step 3. I need the simulation to run for some time after every step- so I've used a random for loop with random no of iterations(here 50) just to elapse some time.
Problem: I checked the signal after running, it is directly reaching the end of function and returning min voltage battery index. (in short it is not stopping for some time after every step)
P.S.: 1. I'm using discrete timestep 2. the behavior happens in a loop i.e.The circuit is such that the voltages change as the 3 steps are executed hence it is important to calculate max/,min in every iteration.
function y = fcn(v1, v2, v3, v4)
ar=[v1,v2,v3,v4];
%step1
[~,I]=max(ar);
y=I;
n=0;
for i=1:50
n=n+1;
end
%step2
y = 1;
n=0;
for i=1:50
n=n+1;
end
%step3
[~,I1]=min(ar);
y=I1;
n=0;
for i=1:50
n=n+1;
end
6 个评论
Walter Roberson
2019-2-25
Are you using a discrete timestep model, or are you using continuous?
Is this behaviour to occur in a loop, that after step3 you go back to the beginning, finding index of the max, taking the three steps, go back, etc. ? Or is the behaviour of these three steps to be triggered? If it is to be triggered then how do you want to handle the possibility of re-trigger while the steps are proceeding?
Pranav Mathur
2019-2-25
编辑：Pranav Mathur
2019-2-25
Walter Roberson
2019-2-25
When you say important to calculate those "every iteration", do you mean every timestep, or every time the series of 3 steps has completed ?
Pranav Mathur
2019-2-25
编辑：Pranav Mathur
2019-2-25
Walter Roberson
2019-2-25
You need to reconfigure the situation entirely. Do not use a MATLAB function block for any of it (except perhaps finding the index of the maximum.) Everything else should be a matter of using latching and switch blocks and clock inputs and arithmetic blocks.
Pranav Mathur
2019-2-27
编辑：Pranav Mathur
2019-2-27
回答（1 个）
Joel Van Sickel
2020-8-24
0 个投票
Hello Pranav,
if you set the controlled voltage source to 0 V, that will turn off the mosefet. You can also use the gate driver block as part of simscape electrical to drive your devices. If the issue is that your pulse is lasting too long, that is an issue with the controller, not the physical model.
Regards,
Joel
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2019-2-25
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