Search found 59 matches

by Kang Li
Wed Dec 22, 2010 8:57 am
Forum: OpenSim
Topic: static optimization vs CMC
Replies: 4
Views: 931

static optimization vs CMC

<t>Opensim provides two tools to estimate muscle forces. We have successfully applied them to model running, stairclimbing, walking. However, the results from static optimization and CMC were not really comparable. For example, before heelstrike, the quadiceps forces from Static Optimization usually...
by Kang Li
Tue Sep 21, 2010 12:06 pm
Forum: Lower Limb Model 2010
Topic: New model version! 2 Legs and CMC-ready
Replies: 2
Views: 774

RE: New model version! 2 Legs and CMC-ready

Could you please present a CMC example using this model?

by Kang Li
Tue Jul 27, 2010 4:31 pm
Forum: A Visualization Tool for OpenSim
Topic: cannot load any setup file
Replies: 3
Views: 881

RE: cannot load any setup file

I tried both Opensim 2.0.2 and 2.1.0 b5.
I was not able to load any setup files
by Kang Li
Tue Jul 27, 2010 4:25 pm
Forum: A Visualization Tool for OpenSim
Topic: cannot load any setup file
Replies: 3
Views: 881

RE: cannot load any setup file

Nicolas,

I use opensim 2.0.2 and start opensim from the bat file.
by Kang Li
Sun Jul 25, 2010 3:48 pm
Forum: A Visualization Tool for OpenSim
Topic: cannot load any setup file
Replies: 3
Views: 881

cannot load any setup file

Hi,
I tried to install the visualization tool.
After installing the tool, the visualization panel disable the setup file part. I cannot load anything. Is it a problem?
by Kang Li
Sun Jul 25, 2010 12:30 pm
Forum: OpenSim
Topic: Why does the different initial time help
Replies: 3
Views: 385

RE: Why does the different initial time help

No. I did not resolve the problem.
I am trying to reproduce the successful stories from this forum and comparing their settings with mine.
by Kang Li
Mon Jul 12, 2010 9:50 am
Forum: OpenSim
Topic: CMC not tracking kinematics
Replies: 6
Views: 715

RE: CMC not tracking kinematics

<t>I have also found that the CMC, RRA is very picky with the starting and ending time. <br/> I have also find that natCubicSpline is also very picky on the points you select. <br/> <br/> I am wondering if the unstability of the CMC and RRA is caused by the unstability of the spinefitting algorithm?...
by Kang Li
Sat Jul 10, 2010 10:15 pm
Forum: OpenSim
Topic: Why does the different initial time help
Replies: 3
Views: 385

Why does the different initial time help

<t>I saw the following message after a failure RRA.<br/> <br/> CMC.computeControls: WARN- The optimizer could not find a solution at time = 0.625000.<br/> If using the fast target, try using the slow target.<br/> Starting at a slightly different initial time may also help.<br/> <br/> Does anyone kno...
by Kang Li
Fri Jul 09, 2010 10:52 am
Forum: OpenSim
Topic: CMC error in the Opensim2.1.0 b1 gait2392
Replies: 1
Views: 298

RE: CMC error in the Opensim2.1.0 b1 gait2392

didnot see such a problem in Opensim2.0.2