AnyForceConstraint

Hi everybody!!!

I have trouble performing the demo on AnyForceConstraint from the reference manual. The aim is to apply constraints on forces, in particular reaction force.
When I run the inversedynamics of the ArmModelStudy, I receive an error message:
" ArmModelStudy2 : Model is kinematically indeterminate : Velocity and acceleration analysis failed : 17 independent constraints and 18 unknowns"

I don’t understand it, because the number of the rigid-body d.o.f and the number of the constraints are the same: 18

Thanks in advance for any help!

Arnaud

Hi Arnaud,

I could run your ‘ArmModelStudy2’ inverse dynamics analysis without any problem.

Right now I’m using the AMS V5.3.1 version.

When you would write a post for debugging your model, please provide your version information. And please make the post on the debug section:
http://forum.anyscript.org/forumdisplay.php?f=21

Best regards,
Moonki

Hi Moonki,

thanks for your answer!
I used a modified Demo.Arm2D.any file, that why it could not run. Because the constraints were not corresponding to the spatial positions of the segments.
I’m using the 5.2.0 Version.

Best regards,

Arnaud

Hi Arnaud,

Then I would suggest you to upload your model which is not working (so your modified model) in the debug section:
http://forum.anyscript.org/forumdisplay.php?f=21

Best regards,
Moonki