Search found 99 matches

by Sina Porsa
Thu Jul 28, 2011 7:24 pm
Forum: OpenSim
Topic: InitialStates in FD
Replies: 2
Views: 562

RE: InitialStates in FD

Hi All,
I still have the mentioned problem. It would be great if someone could help me!!
Cheers
Sina
by Sina Porsa
Sun Jul 17, 2011 9:04 pm
Forum: OpenSim
Topic: InitialStates in FD
Replies: 2
Views: 562

InitialStates in FD

<t>Hi All,<br/> I have a simple 2DOF pendulum model and I want to input different "initialstates" to FD.<br/> As it is obvious, I have only 4 state. This is my initial states file:<br/> <br/> S26pre_CMC_states <br/> nRows=1 <br/> nColumns=4 <br/> endheader <br/> time r1_x r1_z r1_x_u r1_z_u<br/> 0 0...
by Sina Porsa
Tue Jul 12, 2011 11:39 pm
Forum: OpenSim
Topic: Forces between segments- inverse dynamic
Replies: 1
Views: 155

Forces between segments- inverse dynamic

Hi all,
I was wondering why opensim does not report the inter-segment forces when I perform an "Inverse dynamic" or "RRA" on my data? The output *.sto file only has values of torques at each joint, but not the forces.
Regards,
Sina
by Sina Porsa
Tue Jul 05, 2011 9:42 pm
Forum: OpenSim
Topic: HuntCrossleyForce: Orientation of sphere
Replies: 1
Views: 148

HuntCrossleyForce: Orientation of sphere

Hi all;

To define a HuntCrossleyForce, we have to first define a contact sphere on a body by indicating its radius, location and orientation.I was wondering what does orientation of contact sphere mean?
Cheers,
Sina
by Sina Porsa
Mon Jul 04, 2011 8:23 pm
Forum: OpenSim
Topic: Forward dynamic tool and force reporter
Replies: 3
Views: 243

RE: Forward dynamic tool and force reporter

<t>Hi Aymen,<br/> Thanks, It's a handy feature. thanks.<br/> Just one question. To enable the ForceReporter analysis I did this:<br/> <br/> <ForceReporter name="Force_Reporter"><br/> <on>True</on><br/> <br/> which did not work. I replaced "<on>True</on>" with "<on> true </on>" and it worked.<br/> <b...
by Sina Porsa
Sun Jul 03, 2011 10:12 pm
Forum: OpenSim
Topic: Forward dynamic tool and force reporter
Replies: 3
Views: 243

Forward dynamic tool and force reporter

<t>Hi All,<br/> I was wondering if there is a way to run "force reporter analysis" within the "Forward dynamic tool"?<br/> I have an *.OSIM file which has ground-foot contact and I am looking for a *.sto file which has ground contact forces at each time step. Right now, I perform the forward dynamic...
by Sina Porsa
Wed Jun 29, 2011 9:43 pm
Forum: OpenSim
Topic: Implementig Hunt Crossley Contact Model
Replies: 3
Views: 530

RE: Implementig Hunt Crossley Contact Model

<t>Thanks Joana<br/> It was really helpful. just two more questions:<br/> 1- How should I specify contact parameters? Such as stiffness of contact bodies, friction coefficients etc.<br/> 2- If I want to use "elastic foundation force", should I define a half space again?<br/> <br/> Cheers<br/> Sina<b...
by Sina Porsa
Tue Jun 28, 2011 5:13 pm
Forum: OpenSim
Topic: Implementig Hunt Crossley Contact Model
Replies: 3
Views: 530

RE: Implementig Hunt Crossley Contact Model

Hi Joana
I have the same problem, if you have solved your problem, it would be great if you could update this post.
Thanks
Sina
by Sina Porsa
Tue Jun 28, 2011 4:44 pm
Forum: OpenSim
Topic: Center of Pressure from Elastic Foundation
Replies: 1
Views: 395

RE: Center of Pressure from Elastic Foundation

<t>HI Michele<br/> I want to use "elastic foundation force" to model ground - foot contact. But I have some problems. It seems that you have done it before. it would be great if you could help me.<br/> <br/> In order to add "elastic foundation force" to my OSIM file, I added this to my osim file, wi...
by Sina Porsa
Wed Jun 22, 2011 9:18 pm
Forum: OpenSim
Topic: Some problems with HuntCrossleyForce
Replies: 0
Views: 187

Some problems with HuntCrossleyForce

<t>Hi All,<br/> I am trying to use "Hunt Crossley Force" to model foot-ground contact. I added this to my osim file, within my forceset tag:<br/> <ForceSet name=""><br/> <objects><br/> ...<br/> <HuntCrossleyForce name = "PLEASE"><br/> <isDisabled> False </isDisabled><br/> <contact_parameters><br/> <...