Search found 18 matches

by Francesco Mastrandrea
Fri Jun 26, 2009 8:31 am
Forum: OpenSim
Topic: time simulation
Replies: 0
Views: 228

time simulation

I'm not able to change the time simulation. In the leg39 it's not possible to go over 0.4 s. I change the controls.sto and the control.xml and leg39_setup forwarddynamic.xml and pseudostate.sto , but nothing at o.4 the sim stops.
do you have any idea?
thanks
by Francesco Mastrandrea
Tue Jun 16, 2009 9:33 am
Forum: OpenSim
Topic: moment arm vs moment
Replies: 3
Views: 704

RE: moment arm vs moment

thanks, for my technical language moment is a torque, that's it. Now it's a definitely clear.
by Francesco Mastrandrea
Mon Jun 15, 2009 6:49 am
Forum: OpenSim
Topic: leg39_states
Replies: 1
Views: 113

leg39_states

what is the difference between leg39_states.sto and leg39_states_degrees.mot?
which kind of relationship between them we have?
by Francesco Mastrandrea
Mon Jun 15, 2009 6:41 am
Forum: OpenSim
Topic: add a force to leg39 model
Replies: 16
Views: 4600

RE: add a force to leg39 model

<r>I didn't found a right example to modify the coordinates, but I can take a generic one and set the final angle that I want in the knee and then make an interpolation in according to the time. What can I do for the other body coordinates (calcaneus, toe, etc...)? do I still apply interpolation?<br...
by Francesco Mastrandrea
Mon Jun 15, 2009 6:00 am
Forum: OpenSim
Topic: add a force to leg39 model
Replies: 16
Views: 4600

RE: add a force to leg39 model


when I go in analyze menu how can say to pointkinematics to connect this point to the bone. I'm gone on edit but it's impossible to modify something. I need to work more on it to understand it.
by Francesco Mastrandrea
Mon Jun 15, 2009 5:29 am
Forum: OpenSim
Topic: add a force to leg39 model
Replies: 16
Views: 4600

RE: leg 39 folder

there two files very similar (for me are same)
controls.xml and controls_off.xml.
When I used them on the forward dynamic simulation I didn't see any difference.
I opened in XML and they seem the same.
what is the difference?
by Francesco Mastrandrea
Mon Jun 15, 2009 4:22 am
Forum: OpenSim
Topic: simulation time in leg39
Replies: 1
Views: 114

simulation time in leg39

<t>I don't understand why I set a simulation time of 6 seconds in setting window and in leg39_setup_forwarddynamics.xml and the simulation stops only after 0,4s.<br/> I have this message from console:<br/> Integrating from 0 to 0.4<br/> RKF.step: NAN in state 25 at time 0.0140902 (dt = 0.00524288)</t>
by Francesco Mastrandrea
Mon Jun 15, 2009 4:15 am
Forum: OpenSim
Topic: add a force to leg39 model
Replies: 16
Views: 4600

RE: add a force to leg39 model

sorry I found pointkinematics in analyze tool, but my problem is giving the right kinematics, because I don't have marker data.
by Francesco Mastrandrea
Mon Jun 15, 2009 3:26 am
Forum: OpenSim
Topic: .xml editor
Replies: 4
Views: 393

RE: edit leg39_controls.xml

<t>I found this:<br/> <Force name="default"><br/> <body_A> </body_A><br/> <point_A> 0.00000000000000000000 0.00000000000000000000 0.00000000000000000000 </point_A><br/> <direction_A> 1.00000000000000000000 0.00000000000000000000 0.00000000000000000000 </direction_A><br/> <body_B> </body_B><br/> <poi...
by Francesco Mastrandrea
Mon Jun 15, 2009 3:03 am
Forum: OpenSim
Topic: add a force to leg39 model
Replies: 16
Views: 4600

RE: add a force to leg39 model

about pointkiematic practically are you saying to attach a marker where I want to put a force?
is it right?
If I write pointkinematics I did't find anything on the opensim user's guide.

Thanks Ayman

Regards

Franesco