Hello
Thank you for your advice. I modified the FreePosture model of the repository according to my model, and I found the problems. And with “ones for the other numeric” I meant the last 3 columns of SRMatrix(30x33);
{ -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0},
{0, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0},
{ 0, 0, -1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1},
…
…
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 1, 0, 0},
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 1, 0},
{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1, 0, 0, 1}
I tried different combinations of Joints for the fixation of the ribcage on the thoracic vertebral bodies, but I had always too much or too few constraints. The only thing which works until now is a fix Joint at T1 (AnyStdJoint). But let me know when you know a better solution.
Now I can run the MotionAndParameterOptimisation and the InverseDynamicAnalysis (With UpperBoundOnOff=Off.) But I receive much too high forces and moments between the vertebral bodies (ca. 500 000 [N]). The muscles are overloaded. That is more or less the same thing for all muscle recruitment solvers, except the two following:
Polynomial, Power=3; Error: Muscle recruitment solver: solver aborted after maximum number of iterations
MinMaxStrict; Error: Muscle recruitment solver: maximum number of setbacks occurred
Is there a problem with the calibration of the tendons? But there are solely AnyMuscleModel as muscles, do they also need a calibration?
I don’t know where this large forces and Moments come from, I’m grateful for some advices.
Another question: How are the mass and the inertia properties (Jii) related for the Segment appearance (AnyDrawSeg). I noticed that the thoracic vertebral segments (yellow potatoes) are clearly bigger than the lumbar vertebral segments, although the inertia properties are the same and the thoracic vertebral segments have even a smaller mass. And when I reduce the mass of a thoracic vertebral body, the yellow potato become bigger.
Best regards
Gregor