Variable Step between only two values

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.

Answer 1

[Naman Chaturvedi]

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.

[Unknown]

This is exactly what I've done, and it works. Thanks anyway.