% Mit Spiel und Reibung
function [F] = optim_fkt(x)


s=0.1;

rk=10;
ri=10.4;        % [mm];
ro=ri;          % [mm]
ak=40*(pi/180); % [°] 
pcr=30.5;       % [mm]
pcri=pcr-s/2;   % [mm]
pcro=pcr+s/2;   % [mm]

F = [(ri-rk)*sin(ak)-ri*sin(ak+x(2))+2*rk*sin(ak+x(2))-pcro*sin(x(1))-rk*sin(x(1)+ak+x(2));...
         pcri+(ri-rk)*cos(ak)-ri*cos(ak+x(2))+2*rk*cos(ak+x(2))-pcro*cos(x(1))-rk*cos(x(1)+ak+x(2))];