Search found 24 matches

by Ilan Eskinazi
Fri Jul 25, 2014 8:11 am
Forum: Grand Challenge Competition to Predict In Vivo Knee Loads
Topic: 6th competition:Markers
Replies: 4
Views: 825

Re: 6th competition:Markers

Dear Priti, I'm afraid I don't have any photos to show you at the moment and can only refer you to Figure 1 of the Competition data description document, which you have seen already. I think the issue you are having may be partly related to the scaling process itself. Sometimes you have to iterate o...
by Ilan Eskinazi
Thu Jan 09, 2014 7:43 pm
Forum: OpenSim
Topic: LNK2001 error when compiling TugOfWar example
Replies: 1
Views: 325

Re: LNK2001 error when compiling TugOfWar example

Make sure you added all your additional library directories, additional include directories, and additional dependencies (.lib files)
by Ilan Eskinazi
Thu Jan 09, 2014 7:37 pm
Forum: OpenSim
Topic: Can't save model
Replies: 4
Views: 190

Re: Can't save model

That is correct. Each model can only have one default pose.
by Ilan Eskinazi
Mon Jan 06, 2014 1:58 pm
Forum: OpenSim
Topic: CMC and Static Optimization fails with Disabled Muscle
Replies: 5
Views: 1026

Re: CMC and Static Optimization fails with Disabled Muscle

What happens if you delete the muscle altogether, and try to run it?
by Ilan Eskinazi
Wed Jan 01, 2014 2:28 pm
Forum: OpenSim
Topic: Forward Dynamics Simulation Issues
Replies: 1
Views: 176

Re: Forward Dynamics Simulation Issues

Some ideas: 1) Could gravity be extending the fingers? Or any other force? 2) Do your joints have default initial generalized speeds larger than zero, which initially extend the fingers? 3) Have you tried using simple pathActuators instead of muscles? The simulation speed problem could be due to ver...
by Ilan Eskinazi
Mon Dec 30, 2013 2:44 pm
Forum: OpenSim
Topic: Why asymmetric
Replies: 3
Views: 161

Re: Why asymmetric

It seems to me like this is a machine precision issue. 1e-14 could be considered zero (epsilon), as far as PC simulation goes.
http://en.wikipedia.org/wiki/Machine_epsilon
by Ilan Eskinazi
Mon Dec 30, 2013 2:31 pm
Forum: OpenSim
Topic: C++ code excisting models
Replies: 1
Views: 137

Re: C++ code excisting models

You can simply edit an existing model by changing the xml (.osim) directly.
by Ilan Eskinazi
Tue Jun 04, 2013 9:21 am
Forum: OpenSim
Topic: I cannot include OpenSim.h in my mex file
Replies: 2
Views: 663

Re: I cannot include OpenSim.h in my mex file

Sina, I'm not sure if this will help you but I'm attaching an example Matlab command which I use to compile a mex file for my OpenSim application. Perhaps you can adapt it to match your needs. First cpp file is contains mex function. Other cpp files contains other needed code. -L indicate library lo...
by Ilan Eskinazi
Thu Mar 21, 2013 7:54 am
Forum: OpenSim
Topic: ID problems in 3.0
Replies: 10
Views: 1756

Re: ID problems in 3.0

I had the same "matrix is singular" problem but running forward dynamics. The problem was that I had muscles in my model but hadn't specified a control for them. Removing the unused muscles solved the problem.
by Ilan Eskinazi
Thu Mar 21, 2013 7:49 am
Forum: OpenSim
Topic: specifying inputs for inverse dynamics on Matlab API
Replies: 1
Views: 439

specifying inputs for inverse dynamics on Matlab API

Hi. I'm trying to run inverse dynamics from the Matlab API for a single time frame (e.g. time t1). I want to specify the generalized coordinates and their first and second order time derivatives at time t1, plus the value of external forces acting on time t1, and obtain the inverse dynamics loads fo...