Can you verify that OpenSim is installed properly (e.g., path variable)? Could you try building the plugin from source in your machine? I anticipate that this might be an issue with your installation because we can load the plugin. Luca can you verify that you can load the plugin? It might be best t...

Hi, I was investigating the issue. I encountered a strange behavior with the loading mechanism of OpenSim v4.1, which was not causing this behavior in v3.3. If you load the plugin and click to load it each time automatically, it does not load the plugin the next time you open the GUI. Also, in my me...

Hi, This can happen if ground reaction forces are not applied correctly or if the tracking tasks' gains are small. In the first case, please make sure that for the time interval of the RRA analysis you always apply ground reaction forces. If they are not applied, the model falls and is not dynamical...

Hi Ana, I have a short script similar to what you just outlined for Ubuntu 18.04: #!/usr/bin/env bash set -xeuo pipefail # install dependencies in case they are missing # sudo apt-get --yes install git cmake cmake-curses-gui \ # freeglut3-dev libxi-dev libxmu-dev \ # liblapack-dev swig python-dev \ ...

Hi Ana, I think that a direct call to the addInControls controls on the actuators will not work. I have the impression that they are reset to their default value during numerical integration stepping so that the controllers can start adding values. OpenSim expects you to define a controller in order...

Hi Mohsen, Maybe if you build the new version of OpenSim, where we fixed a memory leak ([1] and [2]) in the integrator, this might be resolved. [1] https://github.com/opensim-org/opensim-core/issues/2865 [2] https://github.com/opensim-org/opensim-core/issues/2865 But this is not a guarantee. Maybe t...

Hi, You can check the orientation in child property of the joint associated with the pelvis body. Please have a look at GCMAS tutorial 2014: https://simtk-confluence.stanford.edu/display/OpenSim/GCMAS+Tutorial+2015 There, the model has different access so that it is in line with the CGM (conventiona...

Hi, I think height and age are not used anywhere is the code base. Therefore, they do not have an impact on your simulation and modeling. Maybe they were intended for some future use. As for weight it is important because it is used to calculate the scaling factors for the weight of the scaled subje...

Hi Yunfeng,

In general you can consider static optimization as a viable option. You can find a good discussion between static and dynamic optimization here:

https://www.sciencedirect.com/science/a ... via%3Dihub

Hope this helps.

Hi,

I think even if you limit the translations, the problem is not solved. Some degrees of freedom are very sensitive to the noise and it cannot be solved if you do not improve the measurement. Also, by unlocking all the degrees they can influence the results of the origin degrees of freedom.