Variable Step between only two values

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Hi, I have to run a simulation with a solver step size of 1e-13 for the first 20 or 30 points, and then switch the step size value to 1e-12 for the rest of simulation. How can I tell this to Simulink? In Variable Step Options I only can set the max and min step.
Thanks in advance.

Accepted Answer

Naman Chaturvedi
Naman Chaturvedi on 10 Sep 2018
You can use the sim command to simulate the model from a start time, to a stop time and with a time step. Eg:- If your simulation time is 20 sec wherein, the first half is run with 1e-13 and the second with 1e-12 step size.
>>a=sim('try1','StartTime','0','StopTime','10','FixedStep','1e-13');
>>b=sim('try1','StartTime','10+0.1','StopTime','20','FixedStep','1e-12');
Combined outputs of a and b will give you the desired outputs. Change the #points to time and you will be able to use the code.
  1 Comment
Unknown
Unknown on 10 Sep 2018
This is exactly what I've done, and it works. Thanks anyway.

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