Reference Manual Demo: AnyKinPointSurface File: AnyKinPointSurface.any kinematic analysis failes

Hello everyone,

i would like to run the kinematic analysis in the AnyKinPointSurface.any file from the AnyBody Reference manual. Unfortunatly i get the following error message:

  1. Kinematics (Operation: Main.MyStudy.Kinematics):
    0.0) PreOperation (Operation: Main.MyStudy.Kinematics.PreOperation):
    0.0.0) InitialConditions (Operation: Main.MyStudy.InitialConditions):
    0.0.0) …Design variables have been updated.
    0.0.1) …Load-time positions have been re-established.
    ERROR(OBJ.MCH.KIN3) : D:/omar/D…s/A…2/C…s/AnyKinPointSurface.any(204) : MyStudy.InitialConditions : Kinematic analysis failed in time step 0 : Indefinite velocities

Thanks for reporting this @omarel-edrissi. There seem to be some weird numerical issues here. If I just changed the starting guess slightly by altering the initial positions of rotating segments the solver seems to find a solution.

      AnySeg RotatingObject ={
        Axes0 = RotMat(0.01,x); // <- add this line

This has no effect kinematic solution but only perturbs the starting guess. We will try to look into why this happens in the newest version of AnyBody…

This topic was automatically closed 125 days after the last reply. New replies are no longer allowed.