Obtaining GRFs from a ground contact model

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AUDE LEFRANC
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Obtaining GRFs from a ground contact model

Post by AUDE LEFRANC » Wed Nov 02, 2022 1:14 pm

I've been working with a dataset that I was trying to run CMC followed by IAA on. After seeing super high reserve actuators in some of the participants, I came to the conclusion that there might be something wrong with the GRFs. I decided to then use add a ground contact model. The CMC results looked great, however I'd like to verify that the ground contact forces resulting from the ground contact model look reasonable. What is the best way to look at this? Is there a good way to use those resulting forces for IAA, rather than the experimental GRFs?

Thanks in advance!

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Carmichael Ong
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Re: Obtaining GRFs from a ground contact model

Post by Carmichael Ong » Mon Nov 07, 2022 3:10 pm

I think you should be able to get values from a ground contact model using a ForceReporter analysis. This should provide any forces generated in the model. To use in IAA, you'll likely have to write some custom scripts (such as in MATLAB or Python) to format the ForceReporter output to match what a typical external loads file looks like in one of the examples.

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AUDE LEFRANC
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Re: Obtaining GRFs from a ground contact model

Post by AUDE LEFRANC » Wed Nov 09, 2022 6:47 pm

oh that's easier than expected! Thank you so much. I'll give that a try.

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