It is good you managed to fix the problem of the gimbal lock.
The model fails to run because of wrapping error, the error message is the
1710) : ‘Flexor_Digitorum_Profundus__Digit3.SPLine’ : Number of allowed
iterations for contact solution has been exceeded in
The system failed to calculate the muscle position on the wrapping surface.
One solution is to increase the number of contact points, if you click on
the error message it will open the Muscle file at the corresponding line,
here you have to increase the mesh number:
SPLine.StringMesh = 35; //25
I didn’t run the analysis until the end, if more similar errors occur this
usually solves this kind of problem. Please take care to not increase
excessively this number because the time computation will increase in
consequence. You can also try to modify slightly to position of the joint
where the muscle is wrapping, sometime 0.5 or 1 degree difference in the
joint position solve the problem.
I also noticed that the muscle activity is too high, starting 900% and
increasing. It seems the boundary conditions are not sufficient. For example
the hands on the handlebar are only supported in 2 directions, I think the
hands are making a full grip on it and should be supported (Reaction.Type =
On) in all 6 dof.
Sylvain, AnyBody Support.
From: firstname.lastname@example.org [mailto:email@example.com] On Behalf
Sent: 25. august 2008 05:05
Subject: [AnyScript] Re: Gimbal lock and rotdriver errors
Thanks again for your speedy response. I have just submitted my code
in a folder labeled imatani_work. I have remedied the problem by
closely approximating the inital iyy orientation to pi/2. Also by
significantly changing the movement drivers I can fix the warning. In
the future is there a better way to avoid this error, and is there a
solution if I would like the original pi/2 orientation?
Also when running the full muscle body simulation, it will NOT RUN. I
don’t thik it has to do with my drivers/model, but with how anybody
calculates and changes muscle position. Can you also look at this? Any
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