[student] Asking your help to solve an issue with a function creating algebric loop

Question

Lou Jan 2019-4-18

0
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https://ww2.mathworks.cn/matlabcentral/answers/457270-student-asking-your-help-to-solve-an-issue-with-a-function-creating-algebric-loop

回答： Lou Jan 2019-4-19

Hi,

I am a french student (it might be senior year for you), and iam working on a project for my Ingeniors science class.

I need your help to know if I can change a function that I need ( or not I don't know ) in my simulation. ( The fact is that i wanted to speed up the simulation but the algebric loop forbids me from doing it

Here is the function

function MW = fcn(consigne)
if consigne >= 0
    k = 128/100;
else
    k = 127/100;
end
MW= round(k*consigne) +127;
end

if you need any precision feel free to ask me

Have a nice day

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Answer 1

Walter Roberson 2019-4-18

1
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/457270-student-asking-your-help-to-solve-an-issue-with-a-function-creating-algebric-loop#answer_371284

The problem is not that block: the problem is that you have blocks in which the output is connected to the input, but the calculations are not marked as taking time.

https://blogs.mathworks.com/simulink/2015/07/18/why-you-should-never-break-an-algebraic-loop-with-with-a-memory-block/