How to update values ​​in Simulink

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Shunsuke kishi
Shunsuke kishi 2019-12-18
回答： Mark McBroom 2019-12-29
I am creating a simulation with Simulink. I originally wrote the code in MATLAB script, but it is necessary to block it, and it is blocked mainly using MATLAB function. I want to use the value calculated in the previous loop in the next loop. How should I do that? Here is a simple block. Specifically, a wants to take a value from "initial_value" in the first loop, but wants to update the value from "calculate" in the subsequent steps.

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回答（2 个）

Fangjun Jiang
Fangjun Jiang 2019-12-18
All you need is to declare "a" as a persistent variable.
doc persistent
  1 个评论
Shunsuke kishi
Shunsuke kishi 2019-12-19
Sorry, I forgot to post the photo. I want to use "a" output by "calculate" in the next loop as shown in this photo. When written in code, it looks like this:無題111.png
a = 0;
a0 = 0.1;
while(1)
a = a + a0;
end

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Mark McBroom
Mark McBroom 2019-12-29
It would be easier to do this with basic simulink blocks. See attached screen shot. Unit delay block by default has initial value of a=0 but can be set to non-zero vaue.

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