Extract the value of a signal at t=X sec in Simulink

Hello,

I would like to extract the value of a signal at a precise time. I have a signal (from t=0sec to t=30sec) and I would like to get the value at t=5sec using simulink.

To be more precise, I would like to build a subsystem with as an input my signal (named Y) and giving an output signal that would be :

Y for t<5sec

Y(5sec) for t>=5sec

I was thinking of using an embedded Matlab code but I don't manage to use it. Or maybe there is an easier way ? Could you help me please ? I'm using Simulink 6.3 (an old version :) )

Thank you

Answer 1

[Titus Edelhofer]

Hi,

a simple way is using an enabled subsystem:

• Feed the signal to the inport
• Take the clock block, feed into "Compare to Constant" block, feed into enable port.
• The enabled subsystem is configured per default to "hold" output port signals ...

Hope this helps,

Titus

[Niels]

It works ! Thank you very much !