How can i run different timelines in Simuink?

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Hi Guys. I have modeled a fate and transport system of contaminants in subsurface media with Simulink. This model consists of Subsystem 1 and Subsystem 2. The Problem is when I run the model, both Sub1 and Sub 2 run together but I want that the clock in Sub 2 starts with a delay respect to Sub1. In other words I want Sub 2 starts when sub 1 hit a specific time. I would be grateful if you help me through this.

Accepted Answer

Rashmil Dahanayake
Rashmil Dahanayake on 9 Jun 2014
Edited: Rashmil Dahanayake on 9 Jun 2014
Use "Enabled subsytem" block for both Subsytems.
Updated file attached. Sub system 1 tuns from 0-75s. Subsystem 2 runs from 75-100s taking the value from subsystem1 when t=75s. You can edit the trigger point as required.
  3 Comments
Rashmil Dahanayake
Rashmil Dahanayake on 9 Jun 2014
reuploaded.
Subsystem1 starts at t=0, subsystem2 starts at t=75
For display purpose you can time shift the t-axis using an x-y plot instead of the scope.

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More Answers (2)

Chandrasekhar
Chandrasekhar on 9 Jun 2014
hi. you need to develop a scheduler where in the subsystem2 gets triggered based on subsystem1
  1 Comment
Siavash
Siavash on 9 Jun 2014
As a matter of fact everything would be just fine if I can transport my signal backward. I can not transport backward just forward as long as Transport block does not accept any negative value. Do you have any answer for me? I would be very grateful for your help.

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Rashmil Dahanayake
Rashmil Dahanayake on 9 Jun 2014
Use an embedded matlab function to create a rule to overwrite negative time values. Attach the mdl file to investigate further
  2 Comments
Siavash
Siavash on 9 Jun 2014
I need to shift the signal to zero and then proceed it to the next subsystem. I don't want them to run simultaneously.

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