I am trying to simulate a leg orthosis in standar model, for that I have create the leg orthosis with "AnyExp4SOLIDWORKS with only 1 DOF and I have joined it with the leg with 3 ligament, in adition, this orthosis has 4 nodes to move the orthesis.
Kinematics study works correctly, but it can not to solve Inverse Dynamics study, the program shows this message:
"ERROR(OBJ.MCH.MUS4) : D:/PAU/O..V/D..a/E..V/S..S/S2/A..y/S..y/S2_OrtBi_AnyBody.main.any(43) : Study.InverseDynamics : Muscle recruitment solver : solver aborted due to singular KKT matrix
0) ...Inverse dynamic analysis terminated
ERROR(OBJ.MCH.KIN3) : D:/PAU/O..V/D..a/E..V/S..S/S2/A..y/S..y/S2_OrtBi_AnyBody.main.any(43) : Study.InverseDynamics : Kinematic analysis failed in time step 0"
I thought the problem is the forces created by ligament are not compensated by another forces, for that I have added the class "AnyForceMomentMeasure2" to try to compensate this forces, but it is not working.
And now I don't know what else to try.
Thank you for your kind cooperation