Inverse Dynamics Crashing

Provide easy-to-use, extensible software for modeling, simulating, controlling, and analyzing the neuromusculoskeletal system.
POST REPLY
User avatar
Anne Schmitz
Posts: 76
Joined: Thu May 31, 2007 7:44 am

Inverse Dynamics Crashing

Post by Anne Schmitz » Tue Mar 30, 2010 12:05 pm

I have a simple right leg model with 3 muscles (bothlegs.osim simplified). I have a .mot file specifying degrees of freedom that I can get to move the model. However, when I try to do Inverse Dynamics I can't get it to run. Any ideas why? Do I have to have external forces?
Top
User avatar
Ayman Habib
Posts: 2238
Joined: Fri Apr 01, 2005 12:24 pm

RE: Inverse Dynamics Crashing

Post by Ayman Habib » Tue Mar 30, 2010 1:24 pm

Hi Anne,

Do you have masses/inertia for all bodies? The model provided with OpenSim does not have any. You don't have to have external forces (Arm26 example doesn't either).

-Ayman
Top
User avatar
Anne Schmitz
Posts: 76
Joined: Thu May 31, 2007 7:44 am

RE: Inverse Dynamics Crashing

Post by Anne Schmitz » Tue Mar 30, 2010 1:41 pm

You're right! I think the patella has 0 mass. I'll double check that.
Top
POST REPLY