How to Implement Figure 18-1 (PI Control with Delay) in Xcos and Apply Ziegler-Nichols Tuning?

Specific domains Xcos
1

Hi, I’m a student self-studying process control.
I’m trying to replicate the block diagram shown in the left image (Figure 18-1 from the textbook) using Xcos, as shown in the right image.

The diagram includes:

  • A PI controller Gc
  • A process with transfer function 1/(10s+1)(s+1)
  • A step input and a feedback structure

I have one main qeustion

  1. Is my Xcos block diagram correctly implementing the original system?
  • I used a PID block with D = 0, and placed the delay block in the feedback path.
  • I used a MUX and Scope to visualize the response.
  • I don’t get it how to put timdelay e^-s
  • Am I missing anything?

Any help or example would be greatly appreciated. Thank you!

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image679×540 34.1 KB

2

Hello and welcome to Scilab’s Discourse !

Did you have a look to TIME_DELAY - Time delay ?

S.