Search found 506 matches
- Tue Aug 25, 2020 11:44 am
- Forum: OpenSim Moco
- Topic: exempleSquattoSTand- Add external Load
- Replies: 17
- Views: 4086
Re: exempleSquattoSTand- Add external Load
Sorry, I should have been clearer. I was actually looking for a line higher up. Maybe you could just paste all of the optimizer output? I tried to reduce the convergence and constraint tolerance to 10e-2 and then 10e-1, the mesh interval to 10 and the maximum iterations number to 2000 but it failed ...
- Mon Aug 24, 2020 10:22 am
- Forum: OpenSim Moco
- Topic: exempleSquattoSTand- Add external Load
- Replies: 17
- Views: 4086
Re: exempleSquattoSTand- Add external Load
This error might mean that your constraints can't be satisfied. For example, maybe the muscles are not strong enough.
Sometimes, however, we get this error for reasons we have not yet understood. Could you share the last few lines of output describing the iterations of IPOPT?
Sometimes, however, we get this error for reasons we have not yet understood. Could you share the last few lines of output describing the iterations of IPOPT?
- Fri Aug 21, 2020 9:45 am
- Forum: OpenSim Moco
- Topic: Four-bar mechanism
- Replies: 5
- Views: 1336
Re: Four-bar mechanism
Thanks for those details. I have created my own trc file indicating the position of the input bar at different instants of time (setting a constant angular velocity for the crank) and I want to obtain the velocity and acceleration position of the rest of the bars to check if I get the correct result...
- Wed Aug 19, 2020 11:06 am
- Forum: OpenSim Moco
- Topic: Four-bar mechanism
- Replies: 5
- Views: 1336
Re: Four-bar mechanism
Dani, I'm curious: could you describe why you want to use MocoInverse (prescribing a given motion) rather than MocoStudy (predicting a new motion)? If you provided the motion, you may already know the accelerations. Where is the input motion from? You could do a prescribed-motion forward simulation ...
- Wed Aug 19, 2020 10:21 am
- Forum: OpenSim
- Topic: Rolling On Surface Constraint
- Replies: 2
- Views: 1249
Re: Rolling On Surface Constraint
I would use ContactSpheres on the feet and a ContactHalfSpace for the ground. See this paper for an example of using OpenSim's Hunt-Crossley Force to model foot-ground contact: https://journals.plos.org/plosone/artic ... ne.0217730
- Mon Aug 17, 2020 11:52 am
- Forum: OpenSim Moco
- Topic: Predict walking pattern by using OpenSim-Moco
- Replies: 11
- Views: 2397
Re: Predict walking pattern by using OpenSim-Moco
Carlos,
It's great to hear you got example2DWalking working in Python. Also, thank you for helping out on the forum. Would you be interested in contributing this back to the project? No pressure.
-Chris
It's great to hear you got example2DWalking working in Python. Also, thank you for helping out on the forum. Would you be interested in contributing this back to the project? No pressure.
-Chris
- Sun Aug 16, 2020 5:22 pm
- Forum: OpenSim Moco
- Topic: (close to) minimizing metabolic cost
- Replies: 51
- Views: 9780
Re: (close to) minimizing metabolic cost
Code: Select all
Is the 0.5 version fairly stable for the metabolics goal?
Code: Select all
Or what are the plans for an official 0.5 release?
- Sat Aug 15, 2020 10:31 pm
- Forum: OpenSim Moco
- Topic: (close to) minimizing metabolic cost
- Replies: 51
- Views: 9780
Re: (close to) minimizing metabolic cost
Karthick, you make a good point. There is currently no easy way to "clip"/"rectify" an output. Antoine Falisse contributed a metabolics model that can be used as a goal. It's not in an official release of Moco, but you should be able to try it out with this build (you might need to be logged into Gi...
- Sun Aug 09, 2020 3:22 pm
- Forum: OpenSim Moco
- Topic: 3D walking with contact force
- Replies: 3
- Views: 914
Re: 3D walking with contact force
Are you able to use Moco 0.4.0? Please let us know if you continue to run into issues.
Note that we may still make small changes to Moco's interface in the coming months.
Note that we may still make small changes to Moco's interface in the coming months.
- Sun Aug 09, 2020 3:21 pm
- Forum: OpenSim Moco
- Topic: Query related to UMocoD Project
- Replies: 9
- Views: 2096
Re: Query related to UMocoD Project
Karthick,
If coming by such data proves difficult, you can perform a sensitivity analysis to assess how much the fiber ratio affects your final results. It's possible that the fiber ratio has a small effect on your results.
If coming by such data proves difficult, you can perform a sensitivity analysis to assess how much the fiber ratio affects your final results. It's possible that the fiber ratio has a small effect on your results.