FunctionBasedBushingForce example

[Gabor Piskoty]

Dear All

In a simple pendulum model I would like to use the FunctionBasedBushingForce. My goal is to define the rotational resistance of a pendulum's joint in function of the rotational velocity of the joint. A BushingForce works well (see attachment), but the relationship between the angular velocity and the drag moment can be only linear in case of the BushingForce. With help of FunctionBasedBushingForce I would like to have flexibility regarding the relationship between angular velocity and the drag moment (e.g. a quadratic function instead linear).

Unfortunately, I have problem to figure out the right XML-syntax for FunctionBasedBushingForce. Of course, I checked the Opensim XML-browser, but I'm still helpless.

Please upload any .osim-file (XLM) using FunctionBasedBushingForce. Based on a working example I'm most probably able to figure out the right usage and syntax.

Thank you for your helping hand!

Best regards

Gabor

[Thomas Uchida]

The template XML code can be found in the XML Browser under "FunctionBasedBushingForce". I searched simtk.org and found a project containing examples. Here is a direct link: https://simtk.org/svn/force_plugin/trun ... d_bushing/.

[Gabor Piskoty]

Dear Tom

Thank you very much for your useful hint!

Best regards

Gabor