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Pierre HE
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Joined: Wed Nov 11, 2020 4:46 am

Units

Post by Pierre HE » Mon Sep 20, 2021 7:02 am

Hello,

Is there a document or something on the web which explains what are the units of every variable used in the models ? Currently I am looking for the units of the optimal_force value and the max_isometric_force.

And does an "optimal_force = 1" means that when activating the muscle to do a movement and not just holding the position (isometric) it can generate a force equal to the max_isometric_force ?


Thank you !
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Thomas Uchida
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Joined: Wed May 16, 2012 11:40 am

Re: Units

Post by Thomas Uchida » Fri Sep 24, 2021 2:14 pm

Currently I am looking for the units of the optimal_force value and the max_isometric_force.
Units are SI unless otherwise specified. There are translational and rotational actuators; optimal_force is expressed in newtons for forces and newton-meters for torques. max_isometric_force is in newtons.
And does an "optimal_force = 1" means that when activating the muscle to do a movement and not just holding the position (isometric) it can generate a force equal to the max_isometric_force ?
The calculation of muscle force is described in the "Muscle Model Theory and Publications" section of the documentation (https://simtk-confluence.stanford.edu:8 ... blications) and in the papers that are referenced there.
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