Expanding the digital twin that ISB research group at Linköping University develop. Expanding with biomechanical modelling of the human body by a dance sequence. Later acquired muscle forces will be analysed.
The pipeline is developed in OpenSim. It includes two OSIM files with the model in OpenSim with marker set for both motion capture labs Vicon and OptiTrack. It also includes setup XML files for scaling and inverse kinematics which contains all the information needed in order to run the tools in OpenSim. A motion capture file wich is converted to a TRC file with Mokka is also included but only for the marker set for OptiTrack.
To run this project:
- Start with finding out the orientation of the coordinate system for both OpenSim and motion capture data. If they are the same, the first section in the MATLAB script main_with_functions.m can be ignored. If they are not the same, find out the difference and change in the MATLAB script modify_trc.m and then run the first section of main_with_functions.m
- Next, check so that the desired TRC file is set in the scale_setup.xml file, if not change. It should be a transformed T-pose TRC file.
- Run the next section in the MATLAB script main_with_functions.m
This can also be run through the OpenSim user interface. To do that, open the model and then scale with the scale_setup.xml file and the T-pose TRC file. Then, run the tool inverse kinematics with the IK_setup.xml and the result will contain the MOT file with joint angles.
The tool inverse dynamics is not included in the MATLAB script but it can be obtained through the user interface, where the MOT file is used in order to obtain the torque.