Actuator Controls with Static Optimization

Provide easy-to-use, extensible software for modeling, simulating, controlling, and analyzing the neuromusculoskeletal system.
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Joseph Alston
Posts: 26
Joined: Tue May 13, 2008 9:51 am

Actuator Controls with Static Optimization

Post by Joseph Alston » Sat Sep 12, 2009 7:26 am

I've been trying to run static optimization on my model. But I've run into the problem that I can't seem to control the actuator properly. I have both muscles and ideal actuator in my model. The muscles are being controled just fine with the defaults. However, I can't seen to get the ideal actuators to be controlled properly. I've tried adding a controls constaints file in the same way that it is added for RRA or CMC. But it doesn't seem to work.

Can anyone describe to me how to properly add actuator controls and contraints for static optimization?

I would greatly appreciate any help.
Thank you,
Joseph Alston
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Ayman Habib
Posts: 2248
Joined: Fri Apr 01, 2005 12:24 pm

RE: Actuator Controls with Static Optimizatio

Post by Ayman Habib » Tue Sep 15, 2009 12:10 pm

Joseph,

There are no control constraints used by the Static Optimization tool. The built-in assumption (If you do not set the flag use_model_Actuators) is that muscles can only be activated between .01 to 1.0 and generalized forces control between -1 and 1 (with specified "optimal_force").

Please submit a feature request to make this more flexible.

Thanks,
-Ayman

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