Hello All! Is it possible to use a rolling constraint during CMC rather than a ground contact model? If so, what is the best way to add that to the model? I've been using a HuntCrossley based GCM and it seems to be producing pretty good vertical GRFs, but the ML and AP GRFs still seem pretty far off...

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

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 looke...

I'm working on a project where I essentially prescribe control to a specific actuator at the ankle joint. My goal here was to run CMC with this prescribed controller to see how this affected things like metabolic cost and muscle activation. However, when I run CMC, I get extremely large reserve actu...

So these might be some very basic questions because I'm still getting familiar with the MATLAB-OpenSim API (and OpenSim as a whole), but I can't seem to find anything online so here goes: I am trying to optimize the torque profile generated by a motor that I added to a model. I have added a motor to...

Sounds great. Thank you so much!

Hey All! I'm trying to figure out how to run CMC using the API. However, there is limited info on how to use each method in the API docs. I have set up my code, and then CMC starts running but fails to converge on a solution and crashes after a couple seconds. I think the main reason for this is I h...

Hi Dimitar, Thanks for the insight. So sorry for the delay, I was traveling and didn't have internet access. I have fixed the point values and moments (attached). When the foot isn't touching the plate, I assigned all CP and moment values to zero. I still have the same problems with the large residu...

Sure!

The forces are here: The CP location is here: Ground moment: Best,
Aude

Hi All, I'm hoping you can help me troubleshoot what's going on with my RRA. I've gotten help from everyone in my lab, including the postdoc. No one can identify what is causing the errors. I've also used the troubleshooting page on the website and that didn't help. When I run RRA, I get ridiculousl...