Simulation time in Simulink

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Pablo Panitta
Pablo Panitta on 22 Jun 2018
Edited: Siddharth Kamila on 8 Jun 2022
I need to run a simulation from x sec to y sec in Simulink enviroment. I go to Solver --> set Start time=x Stop Time=y and run simulation. But this doesn´t work because simulation keep starting @ 0 sec. Does anybody knows how to do it?

Accepted Answer

Jingfang Qu
Jingfang Qu on 22 Jun 2018
Hi,
I understand you had some issue when you tried to set the simulation time for the Simulink model. You are in the right direction:
1. Configuration Parameters->Solver->Simulation time
2. Set start time=x, Stop Time=y;
3. Click Apply, then click OK.
4. Simulate the model, it should start with x and stop at y.
To see the start time, you can click on Step Forward instead of run, then you will see T=x at bottom right.
Thanks
  4 Comments
Siddharth Kamila
Siddharth Kamila on 8 Jun 2022
Edited: Siddharth Kamila on 8 Jun 2022
In simulink model, how will we give a simulation time interval in between, while the simulation is running from 0 to 5 sec. Is there any code syntax for this ?
For e.g. :- Let's say, when we start the simulation from 0 sec to 5 sec, the data is processed (input data is given to a system and output data is generated) from 0 sec to 0.05 sec time, then there is an interval from 0.05 sec to 0.06 sec (no processing of data will take place in this interval, no input will be sent to the system and thus no output is generated), and again the data processing goes on (input data is given to a system and output data is generated) from 0.06 sec to 0.11 sec, then again there is interval at 0.11 sec to 0.12 sec (no processing of data will take place in this interval, no input will be sent to the system and thus no output is generated), again from 0.12 sec to 0.17 sec the data processing goes on (input data is given to a system and output data is generated), from 0.17 sec to 0.18 sec, there is an interval (no processing of data will take place in this interval, no input will be sent to the system and thus no output is generated), and like that, this process goes on till 5 sec simulation time.
So, is there any code syntax for providing this time interval ? Atleast give me some suggestion. I am not asking for an exact answer.

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More Answers (2)

Ankita Bansal
Ankita Bansal on 25 Jun 2018
Edited: Ankita Bansal on 25 Jun 2018
Hi, can you see time offset(=4) at bottom right of your figure window?
The time offset is actually the start time you have given. The simulation runs from T=4 sec to T=12 sec only. It's just that the graph is shifted by 4 secs (x secs ).
You can also export the data to workspace and check for the min and max values of tout.
  2 Comments
Ankita Bansal
Ankita Bansal on 25 Jun 2018
"simulation actually last 8 sec"
Hi Pablo, simulation is running for 4 to 12 secs (for 8 secs duration). And the graph you are getting is also for 4 to 12 secs, it's just shifted by 4 secs. (4->0 and 12 ->8)
So (x,y) point in the graph actually corresponds to (x+4,y).

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Pablo Panitta
Pablo Panitta on 27 Jun 2018
Hi Ankita, first thank for keep helping me in this. Unfortunatelly I don´t see the same what you´re seeing.
Picture 1: Complete simulation time Tstart=0, Tstop=12
Picture 2 : Partial simulation time Tstart=4 , Tsopt=12.
The only difference I see is the time finish, but partial simulation is not starting at 4 sec, but 0 sec, which is what I try to avoid.
Thanks Pablo

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