Search found 10 matches

by Maurice Lang
Mon Oct 30, 2017 12:37 pm
Forum: OpenSim
Topic: SO and FD
Replies: 3
Views: 1661

Re: SO and FD

Thank you for your reply! So if I want to perform a muscle driven simulation as input for the forward dynamic I have to use the results from CMC. But if I perform a CMC or a SO on the same problem the results are very different between them also because SO resolves step by step while CMC integrating...
by Maurice Lang
Mon Oct 30, 2017 2:24 am
Forum: OpenSim
Topic: SO and FD
Replies: 3
Views: 1661

SO and FD

Hi everyone, I've tried to do a static optimization with a motion file in order to see muscles activations e forces, then to verify if they should be reasonable I've done a forward dynamic simulation given as input the results (control.sto) obtained with SO, but it doesn't reproduce the original mot...
by Maurice Lang
Fri Oct 27, 2017 12:58 am
Forum: OpenSim
Topic: Reserve Actuators
Replies: 1
Views: 476

Reserve Actuators

hi everyone, I've a question about reserve actuators; I've read that they are actuators that can make up for insufficient muscle strength during a simulation, so I've performed a CMC without them but it falls then I 've added reserve actuators to the coordinates of the model and it runs but how I ca...
by Maurice Lang
Mon Oct 16, 2017 12:40 am
Forum: OpenSim
Topic: Example: CMC arm26
Replies: 3
Views: 413

Re: Example: CMC arm26

Thank you Tom for your reply, I've read the links you show me and they were very useful. The only thing is that I don't unserstand if in the ControlConstrain file is enough to write the <default_min> and <default_max> for my muscles or if I have to insert also the <ControlLinearNode> that descrives ...
by Maurice Lang
Fri Oct 13, 2017 6:05 am
Forum: OpenSim
Topic: Example: CMC arm26
Replies: 3
Views: 413

Example: CMC arm26

Hi everyone , I'm trying to better understand the CMC tool so after read about it on the User's guide I've done the example- CMC but I don't find the "arm26_ComputedMuscleControl_ControlConstraints.xml" file : I understand that this file must contain something about muscles and actuators, but I don'...
by Maurice Lang
Fri Oct 06, 2017 5:54 am
Forum: OpenSim
Topic: Modify existing model
Replies: 1
Views: 657

Modify existing model

Hi everyone, I want to know if is possible to modify an existing model through MATLAB removing some muscles and bodies. In particular I'm interested in modify the Standford VA upper limb model in order to semplify it, putting all the bones of the fingers in a unique body "hand" and removing the musc...
by Maurice Lang
Mon Oct 02, 2017 5:46 am
Forum: OpenSim
Topic: Kinematics for external loads
Replies: 2
Views: 3149

Re: Kinematics for external loads

ok, I understand.
I thought instead I should put another specific .mot file.
Thank you !
by Maurice Lang
Mon Oct 02, 2017 3:41 am
Forum: OpenSim
Topic: Kinematics for external loads
Replies: 2
Views: 3149

Kinematics for external loads

Hi everyone, I'm doing a ID simulation and I have a doubt about external forces ; I don't understand which file I have to put in "kinematics for external loads" option, Is the same .mot file that I use as input for ID that contains the motion of my model? AAA.JPG If I don't specify it what happens? ...
by Maurice Lang
Wed Sep 27, 2017 6:13 am
Forum: OpenSim
Topic: Simulation with external force and SO
Replies: 3
Views: 394

Re: Simulation with external force and SO

Thank you Dimitar for your reply. I read again the guide to better understand how OpenSim works and the link that you wrote to me. So,if I want to observe what motion my force will produce I have to performe Forward Dynamic adding a prescribed force, but, as in my case, if I'm interested to see join...
by Maurice Lang
Mon Sep 25, 2017 8:45 am
Forum: OpenSim
Topic: Simulation with external force and SO
Replies: 3
Views: 394

Simulation with external force and SO

Hi everyone, I'd like to perform a simulation with arm26.osim model, in particular I'd like to see how adding a force to the model the joint reactions and the muscle activations change, but I have some doubts about the process that I have to follow. I've create a motion file and with it I've run Inv...