Simulink stuck on while loop with Time condition

Question

Shehryaar Ali 2022-2-13

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1648870-simulink-stuck-on-while-loop-with-time-condition

回答： Image Analyst 2022-2-13

I want to implement a while loop inside a MATLAB Function in Simulink, whose condition is dependant on time and would not change otherwise. But when I try to run the simulation, it shows "Running" but does not progress beyond that. My real function is rather complex, but here is an example of what I wanted to do:

function [Discharge,Charge] = Decode(Matrix,Time)

mat = Matrix(Matrix~=0);

mat = reshape(mat,numel(mat)/3,3);

Discharge = zeros;

Charge = zeros;

while Time <= 60

Discharge = mat(i,1);

Charge = mat(i,2);

end

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Image Analyst 2022-2-13

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1648870-simulink-stuck-on-while-loop-with-time-condition#answer_895000

在 MATLAB Online 中打开

Look at your while loop. If it gets in there, how does it ever leave? Time does not change in the loop so if Time is less than 60 it will get stuck in an infiinte loop. Another problem with it : since "i" never changed, the Discharge and Charge value will never change. Third problem : there is no failsafe - a way to quit the loop if you exceed some number of iterations that you believe should never be reached. Possible fix:

maxIterations = 1000;
[rows, columns] = size(mat);
loopCounter = 1;
startTime = tic;
elapsedSeconds = toc(startTime);
while (elapsedSeconds <= 60) && loopCounter < maxIterations
    Discharge = mat(loopCounter, 1);
    Charge = mat(loopCounter, 2);
    loopCounter = loopCounter + 1;
    elapsedSeconds = toc(startTime);
end