Hi Jeremy, I am also interested in using Wu Shoulder Model. I just would like to know if the Matlab code still works? I am using OpenSim 4.1 and there is compatibility issue (the API command is somewhat outdated). So I would like to know if it definitely works with OpenSim 3.3 (the code runs perfect...

Hi,

Not sure if this applies to your problem but I fixed mine by changing the child frame of the JRF to the desired body instead of the default 'ground'.

Hazimah

Hi Carmichael, I decided to optimise the muscle forces in MATLAB because optimising in OpenSIM always failed due to 'acceleration constraint violation at the ground_thorax_rot_x' (which has been discussed in the previous forum https://simtk.org/plugins/phpBB/viewtopicPhpbb.php?f=91&t=12083&p=34162&s...

Hi, Has anybody performed static optimisation via MATLAB using the CustomStaticOptimization.m file given in the Advanced Examples? I have managed to complete all the tasks but the optimiser was not able to reach a feasible solution, despite increasing or decreasing the options appropriately. Instead...

Hi Dimitar,

Thank you for your response. For anyone that has the same enquiry, Matlab uses slightly different command:

opensimCommon.LoadOpenSimLibraryExact('file')

Hazimah

Hi,

I am running static optimisation through Matlab for the Thoracoscapular Shoulder Model. In OpenSIM, I would normally have to load the plug-in prior to loading the model. How can I script this command in Matlab?

Thanks,
Hazimah

Hi Mike, SO failed at all time steps. Unfortunately, I haven't managed to get any improvements. As mentioned, when I removed all the muscles from the model and run static optimisation based on reserve actuators only, SO was working fine (no failures at any time steps). This implies that the reserve ...

Hi,

Any response is highly appreciated!

Hazimah

Hi, I am using the Thoracoscapular Model to compute the muscle forces and joint reaction forces. Using the given IK results and reserve actuator file, I can run the CMC without any issue. However, using the same IK results and RA file, I have failures when running static optimisation, where accelera...

Hi Carmichael, Thanks for your reply. I don't think there should be any issues with scaling and IK as I am using the given scaled model and given IK results from the website. I have added reserve actuators (RA) at all joints (with the maximum value of 3Nm at the thorax). When running CMC with this R...