Algebric loop in simulink

How to make algebric loop in simulink,

I have requirment where I have to add two constant numbers with increment of 1, a=constant b=constant

a1=a+b; a2=a1+b; a3=a2+b; a4=a3+b;

[Arun Badigannavar]

I am trying to do it in simulink blocks

Answer 1

[Azzi Abdelmalek]

use this model

[Arun Badigannavar]

Ya I tried this model but I want to set the time,here in this model the time is taken based on solver? I want to calculate it for continuous ,and it should stop when I stop manually,,how to calculate this for continuos updation of 'a' value

[Azzi Abdelmalek]

What do you mean I want to set a time?

[Arun Badigannavar]

How can I put infinite loop in simulink

[Azzi Abdelmalek]

just set stop time to inf (simulation parameter)

Answer 2

[Muruganandham Subramanian]

You can use 'from' and 'goto' blocks from simulink-->signal routing library.

[Arun Badigannavar]

But how to update a1 to a2 to a3,I am trying for loop ,,but not getting how to work with for loop subsystem

[Muruganandham Subramanian]

a1=a+b( for a1(tag name) use goto block to store the value(either 'local' or global), then do continuously..

[Arun Badigannavar]

This doing continuosly am not getting,how to continue it with increment of a1 a2 a3 a4

Answer 3

[Anthony Poulin]

Hey, in your case you don't have an algebrical loop because your operations are in ''cascade'' (english translation of a french word, I don't know if it's understandable). If you want to create one, you have to make an operation like a1 = a + a1.