<t>Does anyone know why when running CMC in the gait2354 model, the MTP and subtalar joints need to be locked? I am trying to run CMC with a feline model of the hindlimb that I developed and the MTP joint is an important joint in the sit-to-stand transition that I am trying to simulate, so I am tryi...

<t>Hi all,<br/> <br/> I was wondering if any of you had used the plug-in feature to implement new cost functions and would be willing to share your examples? I am looking to implement a maxi-mini cost function which minimizes fatigue by maximizing the endurance time of the muscles (Dul et al 1984). ...

Will,

Just updated all of the dynamic parameters in muscle model 4 (time scale, activation1, and activation 2) and now that problem has disappeared. Now the optimization cannot find a solution, but at least that solved the previous problem

Thanks for your help
Lisa

<t>Thanks for the info. I have successfully run Scaling, IK, ID, static opt, and RRA and now just have issues with CMC. So I think it has to be the muscles, and since I am not having issues with Static Optimization I think it has to be some of the dynamic properties including time constants, etc tha...

<t>Will,<br/> <br/> Thanks for your reply. I am using a feline hindlimb model I developed. <br/> <br/> 1. I am using the wrong muscle model (I am using model 4 instead of modal 9)<br/> 2. I have not properly defined the dynamic muscle properties in the model. <br/> <br/> Since my error is state 0 in...

Hi Will,

I am having this same problem and was wondering if you had figured out how to overcome the RKF.step NAN error. My error is in state 0 instead of in state 1.

Cheers
Lisa

Thank you for your response. I checked it out and that doesn't seem to be the problem. Additionally I am getting those results for the entire motion- Ack Any other ideas what might be going on?

Thanks again!

Does anyone know what to do when you run an inverse dynamics analysis and obtain

-1.#IND0000000000000000 and
-1.#INF0000000000000000
are your results for your joint torques? How can you fix this problem?

Thank you