Linear actuator

[Destroyer]

Hello,
I have a question. How can I simulate a linear actuator? This actuator gets a signal between 4...20 mA and it takes 6sec to open the actuator complete. So for example, if I have a signal of 12 mA and i go to 20 mA it should take 3sec to go to that value. How can I build such a model???

Thanks a lot

 

[Lewish]

Use the step function block.

 

[OllieC]

I may be an easier way but maybe you can use a switch to check if the actual position is different to the desired actuator position, selecting between +ve and -ve constant values that can output to an integrator.
This would then increase or descrease
the actuator position until the error gets to zero.