Bushing force Units

Provide easy-to-use, extensible software for modeling, simulating, controlling, and analyzing the neuromusculoskeletal system.
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Heather Lai
Posts: 3
Joined: Thu May 31, 2012 11:06 am

Bushing force Units

Post by Heather Lai » Wed Feb 13, 2013 9:59 am

When trying to apply a moment generated by damping at a joint using a bushing force, should I specify a damping ratio or an angular damping coefficient. If it is a damping coefficient, should the units be in radians, degrees or cycles?

Thank you,
Heather
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Ayman Habib
Posts: 2244
Joined: Fri Apr 01, 2005 12:24 pm

Re: Bushing force Units

Post by Ayman Habib » Thu Feb 21, 2013 12:13 pm

Hi Heather,

Thanks for reporting the issue. We've updated the documentation as follows to help resolve the ambiguity:

rotational_stiffness: Stiffness parameters resisting relative rotation (Nm/rad).
translational_stiffness: Stiffness parameters resisting relative translation (N/m). rotational_damping: Damping parameters resisting relative angular velocity. (Nm/(rad/s)).
translational_damping: Damping parameters resisting relative translational velocity. (N/(m/s)".

This will appear in the documentation of the next release.

Best regards,
-Ayman
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