Hi Raffaella
The definition of the barbell belongs in the environemt file not in
the Brep/Arm3.
I have previously made a description on how this model could be made
i think it anserws some your questions
From previously:
I would suggest that you start with the standingmodel and in the
environment.any file you define a new segment which is the bar. You
should also add drivers for this segment and make sure that it moves
in the way you want before you proceed. Remember to create two nodes
positioned where you want the hands to be located. You should also
remember to give the bar segment a reasonable initial position.
Next step is to make the standingmodel grab the bar. Here you should
modify the JointsAndDrivers.any file. I would suggest that you start
by adding two spherical joints between the right and left hand and
the two nodes you have defined on the bar. Since you have now added
three kinematic constraints in terms of the spherical joint for each
arm you need to remove drivers for three dof for each arm, otherwise
the mechanism will be over determined. I would suggest to remove the
GH flexion, GH rotation and Elbow flexion since these can be
controlled by the movement of the bar. It can be a lillte tricky to
remove the correct dof from the drivers. In the measureorganizer for
the right side there is a vector looking like this
MeasureOrganizer={2,0,1,3,5,6,7,8,9,10};
This tells the sequence of dof to be used
To exclude the dof i listed previously it should look in the
following way
MeasureOrganizer={2,0,1, 3, 5 ,6,10};
This will remove these three dof from this measure, you then need to
remove them form the DriverPos, DriverVel and reaction.type as
well. You can read more about measureorganizers in the manual.
To stretch the knee you could add a velocity to the knee flexion
file, currently it is set to zero.
You can create videos by pressing the record button (red circle),
then run the analysis and press the stop button (black box).
You will then be asked where to save the bitmap files that AnyBody
created. Afterwards you may combine the bitmaps to a video using
external programs such as VideoMach from www.gromada.com or similar,
many programs can do this.
I am not sure what you mean by overlap figure of the skeleton? if it
is a skin like surface this is not possible.
I think the description above answers the last question, in order to
get the boundary conditions right you will need to make the hands
grap the bar segment and not use two individual weights in the
hands, this is to very different sets of boundary conditions to the
model.
On the other hand this model would be easier to make since it is a
kinematically open chain, but you should be aware of the
consequences for the model.
Best regards
AnyBody Support
— In anyscript@yahoogroups.com, “ing_bio982” <ing_bio982@y…>
wrote:
> Hi,
> I need to insert in my model a barbell (file. stl), how can I
make?
> In the section file I have inserted a file weightlifting model of
my
> model with the barbell. it (file. stl) is in
Brep,Aalborg,Arm3D…
> the skeleton is already in the correct initial position, there
would
> be now to position the barbell in the hands. The barbell has to
touch
> ground and is had to find in line with the shoulders and with the
> joint of the toes… subsequently it has to lift following the
> movement of the hands. can you help me?
> And still, is it possible to create a video about the animation of
my
> model?
> Are there some figures or images that I could overlap to the
skeleton
> about bones and muscles to make it nicer?
> To simulate the weight of the bar, that the skeleton has to lift,
is
> correct to insert the weight in his hands?
>
> Thanks
> Raffaella