CMC - How to decrease Residual forces?

Provide easy-to-use, extensible software for modeling, simulating, controlling, and analyzing the neuromusculoskeletal system.
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Carlo Carraro
Posts: 6
Joined: Thu Sep 14, 2023 11:04 am

CMC - How to decrease Residual forces?

Post by Carlo Carraro » Wed Dec 06, 2023 1:23 pm

Hi everyone,
I'm trying to run the CMC tool but I obtain Residual values really too high (see plot attached) compared to reference values given from OpenSim documentation, even if after I have applied the RRA tool I obtain good Residual values (always according to reference values). Also, the kinematics traking errors and the reserve actuators values are good. I attached all the plots so you can see the results I obtained. Do you know how I can improve my results?
Thank you so much.
Attachments
ResidualForces and Moments.png
ResidualForces and Moments.png (43.48 KiB) Viewed 617 times
Reserve actuators.png
Reserve actuators.png (18.5 KiB) Viewed 617 times
Kinematics tracking error.png
Kinematics tracking error.png (23.84 KiB) Viewed 617 times
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Windows
OpenSim 4.3
GUI
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Carmichael Ong
Posts: 401
Joined: Fri Feb 24, 2012 11:50 am

Re: CMC - How to decrease Residual forces?

Post by Carmichael Ong » Wed Dec 06, 2023 1:37 pm

The example The Strength of Simulation: Estimating Leg Muscle Forces in Stance and Swing can be helpful in learning how to best use RRA and CMC and reducing residuals.
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Mohammadreza Rezaie
Posts: 407
Joined: Fri Nov 24, 2017 12:48 am

Re: CMC - How to decrease Residual forces?

Post by Mohammadreza Rezaie » Fri Dec 08, 2023 1:29 pm

Hi, AddBiomechanics is capable of reducing the residual forces and moments further than RRA:
https://simtk-confluence.stanford.edu:8 ... omechanics
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