Search found 99 matches

by Sina Porsa
Wed Jun 22, 2011 4:42 pm
Forum: OpenSim
Topic: Output Hunt-Crossley contact forces
Replies: 1
Views: 519

RE: Output Hunt-Crossley contact forces

<t>Hi Margarida,<br/> I was trying to implement "elastic foundation model" to model the foot-ground contact. But I do not know how should I do that. Should I make some changes to my .osim file? If yes, what are those changes?<br/> It would be great if you could help me to do that.<br/> Regards,<br/>...
by Sina Porsa
Wed Jun 08, 2011 8:05 pm
Forum: OpenSim
Topic: how to add PointKinematics analysis to FD
Replies: 6
Views: 283

RE: how to add PointKinematics analysis to FD

Hi Ayman
I just tried to run it on another computer and it ended up to the same error.
any idea?
Regards,
Sina
by Sina Porsa
Wed Jun 08, 2011 5:41 pm
Forum: OpenSim
Topic: how to add PointKinematics analysis to FD
Replies: 6
Views: 283

RE: how to add PointKinematics analysis to FD

<t>Hi Aymen,<br/> The problem does not arise from the model (the Osim file).<br/> I can run the regular FD tool to integrate state equations for this OSIM file. But when I add the "POINTKINEMATICS" it ends up to an error.<br/> Is there anyway I can attach my xml and osim files here?<br/> I have no i...
by Sina Porsa
Thu Jun 02, 2011 4:57 pm
Forum: OpenSim
Topic: how to add PointKinematics analysis to FD
Replies: 6
Views: 283

RE: how to add PointKinematics analysis to FD

<t>Hi Ayman,<br/> It did not solve the problem.<br/> This is the new xml:<br/> .<br/> .<br/> <in_degrees> true </in_degrees><br/> <body_name> calcn_r </body_name><br/> <relative_to_body_name> ground </relative_to_body_name><br/> <point_name> NONAME </point_name><br/> <point> 0.00000000000000000000 0...
by Sina Porsa
Wed Jun 01, 2011 10:00 pm
Forum: OpenSim
Topic: how to add PointKinematics analysis to FD
Replies: 6
Views: 283

how to add PointKinematics analysis to FD

<t>Hi every one.<br/> I want to add an analysis (PointKinematics) to the forward dynamics. In other words, I want to run this analysis during forward dynamic.<br/> I made some changes to the <ForwardTool> xml file.<br/> I changed this:<br/> .<br/> .<br/> <AnalysisSet name="Analyses"><br/> <objects/>...
by Sina Porsa
Wed Jun 01, 2011 6:46 pm
Forum: OpenSim
Topic: Fail in view window
Replies: 8
Views: 824

RE: Fail in view window

Hi Mateus
I had the same problem couple of weeks ago,tI simply restarted windows to solve it. Had you tried that?
Actually I did not check vtklog, so I am not sure if it was exactly the same problem.
Cheers,
Sina
by Sina Porsa
Tue May 31, 2011 3:57 pm
Forum: OpenSim
Topic: prescribed dof in forward dynamics
Replies: 7
Views: 1415

RE: prescribed dof in forward dynamics

Hi Ayman,
I want to use a non-linear function for "<CoordinateLimitForce>" and also "<BushingForce>".
It would be great if you could help me.
Regards,
Sina
by Sina Porsa
Sun May 29, 2011 9:28 pm
Forum: OpenSim
Topic: prescribed dof in forward dynamics
Replies: 7
Views: 1415

RE: prescribed dof in forward dynamics

Hi Ayman
Can I use a spline to define a custom nonlinear passive torque actuator? e.g. the amount of torque which is applied to the joint is a non-linear function of joints angle.
Ragards,
Sina
by Sina Porsa
Sun May 29, 2011 9:18 pm
Forum: OpenSim
Topic: API question: optimal control
Replies: 1
Views: 245

RE: API question: optimal control

Hi Shiuan-Lin
I cannot open the youtube files, it says that they are private.
Did you use the Forward Dynamic tool with an optimization method to optimize your cost function?
Regards,
Sina
by Sina Porsa
Fri May 27, 2011 6:48 pm
Forum: OpenSim
Topic: Does BushingForce have bug?
Replies: 5
Views: 763

RE: Does BushingForce have bug?

<t>Hi Gregory,<br/> 1- no, directionY is the name of the bushing force which appears in the GUI. this linespecifies the stiffness of spring in each direction: <translational_stiffness> 0 100 0 </translational_stiffness><br/> <br/> 2- No, I used a random location. I just wanted to check how "BushingF...