Input ports (1, Action) If Action Subsystem' are involved in the loop?

I am trying to simulate a closed loop cooling system using simulink but facing this error continously.

If anyone can help me with this would be of great help?

I have uploded the file,if anyone can please run it and share the trouble shooting measures willbe of greta help.

I ahve uploded the mat variable file for initialization parameters of the model

[Murugan C]

I couldn't able to open the model. Because you designed in Simulink 2017a, So can you please upload 2016b simulink model or below version.

[Adit]

Hi

Thanks for help

I have attached 2016b model here.

Answer 1

[Divya Yerraguntla]

Hi Adit,

I could see an algebraic loop formed in your model by the signal coming to Total_pressure_BP input of Pump 1 subsystem. This is actually causing the issue. Try adding a Unit Delay block to the signal coming to Total_pressure_BP block.

For more information about identification and removal of algebraic loops have a look at these links:

https://www.mathworks.com/help/simulink/ug/identify-algebraic-loops-in-your-model.html

https://www.mathworks.com/help/simulink/ug/remove-algebraic-loops.html

Also in order to solve algebraic loops in models containing continuous blocks you could go through this link:

https://blogs.mathworks.com/simulink/2015/07/18/why-you-should-never-break-an-algebraic-loop-with-with-a-memory-block/

Hope it helps!

[Satya Prakash]

Is there any other method to handle signals without adding delay block?