Mechanical endstops ?

[panda967]

Hi. Is there a mechanical endstop component in hopsan? I need it in order to simulate an automatism.
Massimo Lo Iacono

[robbr48]

Hi Massimo,
You can define the end stops directly in the translational mass components (and most similar components). The parameters are usually called "xmin" and "xmax". You can also model the end stop as a stiff spring, have a look at the "Bouncing Ball" example model for this.

[panda967]

Thanks!

[panda967]

How can I use x_min and x_max as a switch to send a signal?

Thanks.
Massimo

[robbr48]

You mean you want to change the endstop positions during simulation? This is not supported by the builtin endstop parameters, as they are only read once during initialization. A workaround could be to use a force source and some signal components to make it behave as a stiff spring when the end position is exceeded. It probably needs some damping as well to avoid bouncing ball-behaviour. See attached model for an example.
dynamic_endstops.zip

[panda967]

I think the greater-than-comparer serves the purpose.
Thanks.

Massimo