Prescribed Force

Provide easy-to-use, extensible software for modeling, simulating, controlling, and analyzing the neuromusculoskeletal system.
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Karishma Sebastian
Posts: 14
Joined: Tue Apr 17, 2018 5:17 am

Prescribed Force

Post by Karishma Sebastian » Thu Jun 14, 2018 5:31 pm

Hie!!

I read the documentation about prescribed force. I want a clarification about the function:

void OpenSim::PrescribedForce::setPointFunctions ( Function * pointX,
Function * pointY,
Function * pointZ
)

My models ground body is pelvis.I am applying a prescribed force to the scapula. I have set the body to which the force is applied as scapula. The coordinates mentioned above should it be with respect to the ground body or the body to which the force is applied? Please help me out.
Tags:
OpenSim 3.3 and Earlier
MATLAB
Windows
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Thomas Uchida
Posts: 1777
Joined: Wed May 16, 2012 11:40 am

Re: Prescribed Force

Post by Thomas Uchida » Thu Jun 14, 2018 5:53 pm

The coordinates mentioned above should it be with respect to the ground body or the body to which the force is applied?
Can be either; default is the body frame. See the pointIsGlobal property (in the "Property declarations" section here: https://simtk.org/api_docs/opensim/api_ ... Force.html).
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User avatar
Karishma Sebastian
Posts: 14
Joined: Tue Apr 17, 2018 5:17 am

Re: Prescribed Force

Post by Karishma Sebastian » Thu Jun 14, 2018 6:50 pm

Thank you so much. Could you also give me some more clarity on the SetForceIsInGlobalFrame? And does setting it as 0 make the force with respect to body frame?

Another doubt:
I would also like to know if I can carry out to forward dynamic simulations at the same time? I have 2 subjects with different external forces acting on them. I put one on simulation and then the next. Would one simulation affect the other?
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