Hello, I have seen this before. I created Bootbaan.osim, with works perfectly in the Gui, playing with the coordinate values and such. If I remove 2 bodies and the relevant joints, creating Bootbaan_1.osim, it first seems OK but I cannot change any coordinate in the Gui! It is a perfectly valid mode...

I found the issue here. Setting the "sampling rate" in the trc/mot file to 100 Hz made the system stable! Makes sense to me. So then I tried to increase the complexity of the model towards my goal system. Adding the other upper arm: works fine. putting this on top of a "boat-box" that is connect wit...

Hi Nick, > The GUI can only load an existing model, it doesn't support model building/modifying yet I meant that, after loading the model in opensim, that the sliders to control the coordinates do not work at all. Nothing to do with moco. I tried to add an initial guess file. I used the same traject...

Hi Nick, What exactly do you mean by the initial guess? I don't see any guess here, only the intended trajectory. The example in directory Moco does NOT have any oars in it, only a basic leg and torso, see the picture above. I now also removed the riggers and oarlock to make it even more simple, see...

I think we have to take a stap back to the model from https://github.com/SietseAchterop/Rowing-simulator/tree/master/BootBaan/Moco . It seems to move, but in a wrong direction. The more complicated model above (in Moco_2) does something similar. I played a bit with the weights, but that did not make...

Next step, also almost works! b.png This is the simplest complete model. In the trajectory the blades are not "touching the water" yet, so no contacts there. The movement looks OK, only the boat moves in the wrong direction I think. I have to figure that out. And objective_state_tracking=11.1, so we...

Great, its working! After adding zero weights for the speed it works perfectly. And with that working I tried a simplified version of the final model. bootbaan.png This model and mocotrack results can be found at https://github.com/SietseAchterop/Rowing-simulator/tree/master/BootBaan/Moco . This als...

Hello list, I have asked this before, but I learned alot about opensim and also simplified the example further. The stability problems still exist and only go away when the upper arm is removed (or fixed). bb_simple.png Think torso, shoulder, upper arm. The torso is sitting on a slider. It is an ext...

Ha, progress! The trajectory now looks a little bit as intended, so I switched back to the model with the ElasticFoundationForces and the weights for the boat set to zero. After some fiddling with the weights i now have objective_state_tracking between 0.2 and 1, so it follows the trajectory fairly ...

To answer my own question: I had an error in the tasks file for CMC. Sorry for the noise.