OpenModelica modelling Coulomb friction: Translation Error, post-optimization module findZeroCrossings (simulation) failed

Question

I\'m trying to simulate Coulomb friction in Modelica. The basic concept is to check if relative velocity speed between to surfaces is less than a constant and the external force

Answer 1

Your model does work with the 1.11 release. The issue is the extends coulombFriction; statement. Once you removed it, it should work fine even without the noEvent calls:

package Friction
  function coulombFriction
    input Real relVel;
    input Real shearForce;
    input Real normalForce;
    input Real statfricco;
    input Real kinfricco;
    output Real fricForce;
  algorithm
    if relVel==0 and abs(shearForce)