How schould the matlab function be to hold an signal between two values?

2 次查看（过去 30 天）
AF
AF 2022-10-7
评论： AF 2022-10-7
I have a rising signal of a temperature. As long as the value has not reached a limit, e.g. 90%, "0" is to be displayed. If the value is reached, 1 is displayed. After that, the value can drop to e.g. 30% until "0" is output again. This is to achieve that the value remains between the two limits by the output of 0 and 1.
It is about a Simulink model and the code for it should be in a matlab-fct block.
I tried a lot with if-functions but i dont get it.

请先登录，再回答此问题。

采纳的回答

Les Beckham
Les Beckham 2022-10-7
编辑：Les Beckham 2022-10-7
Perhaps something like this in a MATLAB Function block?
function out = determineStatus(in)
persistent out
if isempty(out)
out = 0; % initial output value
end
% implement the hysteresis
if out = 0 && in > 90
out = 1;
elseif out = 1 && in < 30
out = 0;
end
end
  4 个评论
显示 2更早的评论
Les Beckham
Les Beckham 2022-10-7
编辑：Les Beckham 2022-10-7
@Fangjun Jiang
Of course you are right (== instead of =). Thanks for pointing that out. I thought about true/false vs. 1/0 but since OP specifically asked for 0 and 1, I went with that.
Also, good call on the relay block. I knew there was a simpler way to do this with a built-in block but I don't currently have Simulink to browse through the library.
@AF
Then feed B/A into the function and change 90 and 30 to 0.9 and 0.3.

请先登录，再进行评论。

更多回答（1 个）

Fangjun Jiang
Fangjun Jiang 2022-10-7
The Relay block does exactly that.

类别

在 Help Center 和 File Exchange 中查找有关 Sources 的更多信息

标签

产品


版本

R2022a

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by