How to modified step input signal in simulation ?

[terwelu]

Hi there,

I have my own Transfer Function model. I did the simulation first with Matlab/Simulink and got succeeded. I use the Signal Builder in Simulink to output my customized step signal. I modified my step signal so at :
- t=0 y=0
- t=0.1 y=0
- t=0.1 y=50
- t=10 y=50
- t=10 y=65
- t=30 y=65.

It's kind of staircase input signals. Now, how to build such this customized step signals to be fed in my transfer function. I tried the "Step Signal" function from the "Simulation" but I can only got the 50 and I don't know how to add more "stairs" into my input signals. Could someone help me ?

[Barp · Accepted solution]

Look at this post here:

http://forums.ni.com/ni/board/message?board.id=170&message.id=237060&query.id=67001#M237060

and download the LUT Problem.vi. This code explain how to create your own profile with the "Simulation Time" and "LUT". In short, you can use the LUT model to create your profile and use the Simulation time to generate the necessary points.

Hope this helps!

[terwelu]

Thanks Barp, it works very well !