Hi, I am trying to perform a RRA tool on the last Rajagopal model (RajagopalLaiUhlrich2023). For this I've taken the same setup files that I use for a gait2354, in this case the RRA tool works perfectly, adding the corresponding coordinate actuators, task (CMC joints) and control constraints, as lon...

You can also edit the model markers opening the .osim file with a text editor as Notepad++
there you can edit name, position and body to attach the markers

Hi Catarina I have gone through the literature I have found and as you say they all refer to walking test. In my research work I'm studying stance positions, but don't use EMG sensors and when I have tried to predict the GRF the response has been to make feet-ground contact models. One solution that...

Hi Catarina, From my experience I would say that perform inverse dynamics without GRF is not feasible for a lower limbs analysis. Maybe you could estimate the forces from the EMG measures and the weight, I have read something about that kind of process. Another longer and complicated way to do that ...

Hi Nick,

Thank you for the help, I will try to reconsider the problem as obviously using constraints does not seem to be a good way to proceed.

Best,
Adrian

3) Add a constraint of the foot with the ground to obtain the generated forces. This case is only valid for studies where the foot is not moving (doing squats, evaluating balance, weight lifting, etc). It seems this is technically correct, but it's very tricky to deal with in practice. So the first...

Hi everyone, I'm working on a study about balance and I want to know if there is a way to predict the GRF. In most cases people create contact models between the feet and the ground, but it seems to be complicated. I've seen some studies that try to predict the GRF during squats using simplified sin...

I am predicting GRF and GRM during squat lifting. The feet are static during lifting, so I built a weld constraint between each foot and the ground and the weld point is not at the CoP because I do not know where is CoP. I successfully got a set of forces by inputting the motion data to 'Analyze' t...

Hello, I am also researching this topic, I have found the following related posts on the forum, maybe you can find some information here: https://simtk.org/plugins/phpBB/viewtopicPhpbb.php?f=91&t=7095&p=34452&start=0&view= https://simtk.org/plugins/phpBB/viewtopicPhpbb.php?f=91&t=11946&p=33745&start...

Hi Lidia, If it is just to make a test I usually make a copy of any sto file, then open it with Excel and replace the information (copy -paste) of your original Excel document and save it, but not with the "save as..." command, just overwrite the file. After that, you can change the name of the file...