Hi AnyBody:
I wish calculate the joint contact force and try to understand the output of the reaction force.
Attached is a sample of knee joint; it is one DOF. My understand is that the joint contact force should be calculated from: “…Knee.Constraints.Reaction.Fout”.
If “…Knee.Pos[0]” is in “x”; the constrain reactions should be:
… Knee.Constraints.Reaction.Fout[0] – Fx
… Knee.Constraints.Reaction.Fout[1] – Fy
… Knee.Constraints.Reaction.Fout[2] – Fz
… Knee.Constraints.Reaction.Fout[3] – My
… Knee.Constraints.Reaction.Fout[4] – Mz
Such that the joint contact force magnitude should be:
\sqrt(Fx^2+Fy^2+Fz^2).
Is that right?
John Wu