Hello all Is it possible to calculate the moment of inertia of a body with respect to the body's origin through the MATLAB API? Or a way to transform the default value given about the centre of mass to the body origin? I know these commands exist within the SimTK namespace and that these aren't yet ...

Hi Tom, sorry for the late reply

For the Arm26 model yes it does, assuming the call is returning the accelerations of the generalised coordinates described by the state (essential Udot?). The block model I'm analysing returns zero values for this call, despite having Q and U values in the state.

Hi all I'm trying to learn more about how the getAccelerations function works in order to validate that a process being constructed through the MATLAB API is extracting the correct results. Currently I'm simply attempting to extract the acceleration of a simple cube body which has only a single tran...

Yeah sure, it's essentially just this:
With 'LoAxml' being the path to the settings xml for the analysis.

Hi Christopher

I've tried this, but unfortunately the result is the same. Do you have any other ideas?

Hi all I'm trying to run a user plugin (MuscleForceDirection) for OpenSim3.3 through the MATLAB API. The plugin loads and runs fine in the GUI but when I try to run it through MATLAB I get the following error: Failed to load library MuscleForceDirection.dll ERROR- library MuscleForceDirection.dll co...

Ah, I suspected this would be the case. No worries

Thank you very much for your help Christopher!

Hello all I'm trying to use the call getTotalCentrifugalForces to attain the force contribution from Coriolis and centrifugal forces on a model through the MATLAB API. I understand that this function and several other SimBody commands need to be called on a MatterSubsystem through getMatterSubsystem...

Ultimately, we are attempting to extract all the forces and moments of force and their point of application on the femur for each frame of the gait cycle. This is for the intended purpose of using these specific force vectors as the input to finite element modelling. We are attempting to verify the ...

Hi We are attempting to extract all the forces (muscle, reaction, inertial and gravitational) acting on a particular body at each frame in time. We’re currently having issues trying to obtain accurate values for the acceleration components and were wondering if you could point us into the right dire...