Hello, I can't figure out how to get MocoOutputGoal costs to work through the Matlab or C++ API's. Here's how I've been defining the goals: // Set up kinetic energy goal if (w_kinetic > 0) { auto* kinetic_goal = problem.addGoal<MocoOutputGoal>("kinetic", w_kinetic); kinetic_goal->setOutputPath(kinet...

Hello, I'm trying to run the MocoTrack tool for a problem in implicit mode using Matlab, but am running in to this error: java.lang.RuntimeException: casVector should be 1-dimensional, but has size 0 x 0. Thrown at MocoCasOCProblem.h:108 in convertToSimTKVector(). The same code when run in explicit ...

I would like to visualise assistance forces in the GRF which are not applied in the normal location for GRFs. However, whenever I try to do this OpenSim gets an error. Here's a minimal example. Steps: 1) Load default gait2392 model from resources folder. 2) Load subject01_walk1_ik file. 3) Associate...

Hello, I'm running static optimisations on some data. I find that static optimisation solves fine for most timesteps, but for some (typically 1 - 2 timesteps per gait cycle), I get an error similar to the following: time = 0.89 Performance = 524.291 Constraint violation = 1.56921e-09 WARNING- Analyz...

Hi Russell,

I now have the same problem as you (amusingly the opposite problem to when I originally created this post).

Did you find a nice way of suppressing the output to the command window?

Cheers,

Daniel

Thanks for the quick help. I'll try that or maybe using the Tropter solver without prescribing kinematics.

Out of interest, is there an easy way to know which model parameters require calls to initSystem() and which don't?

Thanks again

Hi, I've set up a MocoStudy tracking prescribed kinematics and minimising muscle activations as well as penalising deviations from reference control values in the cost term. This runs fine. However, when I try to add a MocoParameter to optimise the max isometric force value for a muscle, like so: pa...

Hi Dimitar, Thanks for the help. However, we are running inverse dynamics on the CMC_Kinematics_q file that is output from the CMC simulation - in this case, wouldn't we expect the ID torques to be equivalent to the sum of the muscle force/reserve actuator contributions, since it is computed for the...

Apologies for the quite simple question but I seem to have a gap in my understanding somewhere that I can't figure out. Basically, I want to show that the summed contributions of muscle forces & reserve actuators matches the inverse dynamics solution for a set of motion states obtained from CMC. Inp...

Hi, I was wondering if it's possible in OpenSim 4.1 to create a custom controller component in Matlab (e.g. in a similar manner to as is done in the TugOfWar Controller example in the C++ files). I know this wasn't possible in OpenSim 3.3 but just wanted to check. I have a work-around involving the ...