static optimization fail
Posted: Thu Dec 05, 2019 4:49 pm
Hello,
I'm using a shoulder model, isometric kinematics, external loads (biodex data), and static optimization. The static optimization is successful without the external loads, but when I add the external load the static optimization fails. I've tried to add actuators as suggested in the OpenSim actuators tutorial and similar posts in the forum, but the static optimization still fails. Any suggestions?
Here is the final output of the fail simulation:
time = 0.991666 Performance =1.3618e-005 Constraint violation = 6.60446e+135
SimTK Exception thrown at InteriorPointOptimizer.cpp:261:
Optimizer failed: Ipopt: Search direction becomes too small (status 3)
OPTIMIZATION FAILED...
StaticOptimization2.record: WARN- The optimizer could not find a solution at time = 0.999999
time = 0.999999 Performance =1.3618e-005 Constraint violation = 6.60446e+135
Printing results of investigation synergy_shoulder_model to C:\Users\thisi\Downloads\SynergyOptimizationPlugIn\SimTK_SynergyOptimization\Results.
I'm using a shoulder model, isometric kinematics, external loads (biodex data), and static optimization. The static optimization is successful without the external loads, but when I add the external load the static optimization fails. I've tried to add actuators as suggested in the OpenSim actuators tutorial and similar posts in the forum, but the static optimization still fails. Any suggestions?
Here is the final output of the fail simulation:
time = 0.991666 Performance =1.3618e-005 Constraint violation = 6.60446e+135
SimTK Exception thrown at InteriorPointOptimizer.cpp:261:
Optimizer failed: Ipopt: Search direction becomes too small (status 3)
OPTIMIZATION FAILED...
StaticOptimization2.record: WARN- The optimizer could not find a solution at time = 0.999999
time = 0.999999 Performance =1.3618e-005 Constraint violation = 6.60446e+135
Printing results of investigation synergy_shoulder_model to C:\Users\thisi\Downloads\SynergyOptimizationPlugIn\SimTK_SynergyOptimization\Results.