Mor,

There is an option in Simulation Center under Tools>initialize>To Steady State but I could not get it to work for this model. You certainly would need to replace the detachable spring with a regular one.

One possibility is that you need to add some damping to the model so it eventually simulates to steady state. But even making the spring damped, the model takes a REALLY long time to settle (like never). You need to damp the pendulum effect to get the model to settle out. BUT, even trying this, I get errors from Kinsol (the kinematic solver) so I am not sure what the problem is.

Maybe @Ankit Naik has some insight on how to make initialization work with this model.

I'd like to know: Does the steady state initialization work on models without damping? Without damping there is a steady state but with any offset, the model will never get there. Why does Kinsol fail when I put damping in and get it to reach steady state?

Some other Ideas

1. Alternatively, you can simulate the model to steady state yourself (if you add damping) and do initialize from Experiment, but this also does not seem to work with this model. I suspect a bug or incompatibility with the Multibody model??

2. I suppose you can simulate to steady state and manually copy the steady state but I guess this will be problematic because you can't get the numbers exact so your system will not be consistent.

3. I would try the same system without the Multibody components -- that will likely initialize and you can use those settings to initialize the Multibody simulation.

4. You can extract the equations of motion of the system from SystemModeler to Mathematica and find the steady state solution on your own by setting all the derivatives to zero.

I hope this helps,

Regards,

Neil