value that increase along with changing value by manual switch block simulink using embedded matlab function

2011 7 15
5 个回答
回答已采纳
7 次查看（30 天）

0 个投票

hi all
i just wanna ask,how we do the increasing value by changing manual switch in simulink??
for example: i have manual switch, with 2 constant block connect to it, first signal= 1 , second=0. i have calculation that everytime we change value in manual switch the system will add 10 to the current signal.
how we do it with embedded matlab function??

1 个评论
显示 -1更早的评论 隐藏 -1更早的评论

Walter Roberson
Walter Roberson 2011-7-15
Duplicate is http://www.mathworks.com/matlabcentral/answers/11705-value-that-increase-along-with-changing-value-in-manual-switch-block-simulink

请先登录，再进行评论。

请先登录，再回答此问题。

 采纳的回答

Fangjun Jiang
Fangjun Jiang 2011-7-15

1 个投票

Do you have to use EML? If not, it could be done easily in Simulink using a trigger subsystem. Type "sldemo_counters" to open the demo model, connect your manual switch block output to the triggered subsystem. Inside the system, change the trigger from "risgin" to "either", change the constant from 1 to 10 then you got it.

更多回答（4 个）

Walter Roberson
Walter Roberson 2011-7-15

1 个投票

Please do not open duplicate questions; it just ends up duplicating efforts.
You can edit your previous question if needed.
Kaustubha Govind
Kaustubha Govind 2011-7-15

1 个投票

FWIW, here's an EML implementation:
function y = mycounter(u)
%#eml
persistent count;
persistent prevInput;
firstInput = false;
if isempty(count)
count = 0;
end
if isempty(prevInput)
prevInput = 0;
firstInput = true;
end
if ~firstInput
if (prevInput ~= u)
count=count+1;
end
end
prevInput = u;
y = count;
end
Fangjun Jiang
Fangjun Jiang 2011-7-15

1 个投票

Okay, feed the switch output signal to the triggered subsystem, still choose "either". Also, feed the switch output signal to an Inport of the the triggered subsystem, multiple it by 10, then feed it to an Integrator block. Did not verify. Should work. Try it yourself.

3 个评论
显示 1更早的评论 隐藏 1更早的评论

Luhur
Luhur 2011-7-15
error fang, it was:
'untitled1/Triggered Subsystem/Integrator' has a continuous sample time. Only constant (inf) or inherited (-1) sample times are allowed in triggered subsystem 'untitled1/Triggered Subsystem'.
anyway, im using slider gain with value -1,0,1

请先登录，再进行评论。

Luhur
Luhur 2011-7-15

0 个投票

what if i have 3 signal fang??? -1,0,1 ,, if -1 then the current value was be diminished, 0 the value stay still and 1 the value increase.

4 个评论
显示 2更早的评论 隐藏 2更早的评论

Fangjun Jiang
Fangjun Jiang 2011-7-15
It certainly can be done. It is different though. Your original intention was to increase the counter by 10 every rising or falling edge of your switch output. This one, how do you increase if the switch output is 1? Increase 10 at every time step? Or there is something else trigger the increase?
Luhur
Luhur 2011-7-15
nope, only 1 trigger, if 1 then current value add by 10, if 0 then current value stay still, if -1 then current value minus by 10.
how is it fang???
Fangjun Jiang
Fangjun Jiang 2011-7-15
If 1 then current value is increased by 10. Increased only once, or every time step as long as the switch output is 1?
Luhur
Luhur 2011-7-15
no only once, the case was the same with the manual switch, but in this case there was 0 and -1 for minus it.
so when curent value is 10, then the signal give 1, then 10 + 10 = 20,, and then the signal gives 0, then 20 + 0 = 20,, and if the signal gives -1, then 20 - 10 = 10,,
so now, the current value is 10.
how is it fang???

请先登录，再进行评论。

类别

在 帮助中心 和 File Exchange 中查找有关 Simulink 的更多信息

产品

标签

Community Treasure Hunt

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

Start Hunting!

Translated by