Thank you for your reply, but I found that after making this adjustment, there is no noticeable difference in the results. Here is the code snippet: for i in range(nCoords): coord = coord_set.get(i) coord_value = data.get(i * 2) coord_speed = data.get(i * 2 + 1) coord.setValue(state, coord_value, Fa...

After performing static optimization, I obtained two files: `HYOID_Scaled_StaticOptimization_activation.sto` and `HYOID_Scaled_StaticOptimization_force.sto`. I am now using the activations obtained from the static optimization to calculate muscle forces and comparing them to the forces from the stat...

I am using the Millard muscle model. I have already configured the compliance of the tendon. After setting the values and velocities of the coordinates, I set the muscle activation and calculated the fiber length using `computeFiberEquilibrium`. However, I found that the results are the same in the ...

I have been unable to call OpenSim through MATLAB. I have confirmed that OpenSim's environment variables are correctly set, and I can run OpenSim via the CMD command line. However, I cannot identify the reason for this issue. >> build_and_simulate_simple_arm >> build_and_simulate_simple_arm Failed t...

Considering that the fiber length in CMC is obtained through integration, the fiber length calculated using the second method is very close to that of CMC but not exactly the same. However, while the muscle forces obtained by the two methods are quite similar, the accelerations differ significantly....

I compared again the fiber length calculated by the second method with the results from CMC and found that the numerical difference is very small. However, the accelerations obtained from the two methods differ significantly. How should this be interpreted? Additionally, I compared the muscle forces...

I am using the arm26 model from the OpenSim model folder. After performing a CMC analysis, I obtained a states file "arm26_states.sto" and an accelerations file "arm26_Kinematics_dudt.sto". I did not set any reserve actuators. I am now using two methods to calculate accelerations at each time step b...

Thank you very much, this solved my problem.

Thank you for your reply, but it still doesn't seem to work. Please take a look at the following error. I am using OpenSim 4.5 installed via Conda. opensim 4.5 py311np123 opensim-org import opensim as osim model = osim.Model("arm26.osim") model.initSystem() coordNames = model.getCoordinateNamesInMul...

I'm trying to get the coordinates in multibody tree order (not CoordinateSet order). coords = model.getCoordinatesInMultibodyTreeOrder() type(coords[0]) opensim.simulation.ReferencePtrCoordinate model.getCoordinateNamesInMultibodyTreeOrder() ----------------------------------------------------------...