Search found 48 matches

by Pia Stefanek
Sat Aug 04, 2018 4:52 am
Forum: OpenSim
Topic: IAA- Exception:no identifiable body index
Replies: 1
Views: 159

Re: IAA- Exception:no identifiable body index

Or does someone at least know what is meant by Body index?
Should I Change something in the Setup file?


Regards
by Pia Stefanek
Fri Aug 03, 2018 3:21 am
Forum: OpenSim
Topic: IAA- Exception:no identifiable body index
Replies: 1
Views: 159

IAA- Exception:no identifiable body index

Hi, I try to do a IAA of the 'Gait10dof18musc' model. I made a Setup File where I added a Rolling on Surface Constraint for the external Forces. I attached the model, the Setup file and the external Forces file. The Analysis runs when I don't report the constraint reactions. When I want to report th...
by Pia Stefanek
Wed Jul 18, 2018 8:44 am
Forum: OpenSim
Topic: Tension and strech of a biarticular Path Spring
Replies: 5
Views: 366

Re: Tension and strech of a biarticular Path Spring

Thank you very much! I managed to get the length with the following Code: >>> model = getCurrentModel(); >>> state = model.getWorkingState(); >>> force = modeling.PathSpring.safeDownCast(model.getForceSet().get("BiarticularSpringDamper")) >>> length= force.getGeometryPath().getLength(state) I hope t...
by Pia Stefanek
Tue Jul 17, 2018 1:06 pm
Forum: OpenSim
Topic: Tension and strech of a biarticular Path Spring
Replies: 5
Views: 366

Re: Tension and strech of a biarticular Path Spring

Thank you very much for your Reply!

Can you tell me if I can use the getLength() method in the scripting shell window or is this not possible?
by Pia Stefanek
Tue Jul 17, 2018 6:07 am
Forum: OpenSim
Topic: Tension and strech of a biarticular Path Spring
Replies: 5
Views: 366

Tension and strech of a biarticular Path Spring

Hi, I replaced a muscle (gastrocnemius) of the right leg by a biarticular path spring as described in "Simulation-Based Design to Reduce Metabolic Cost" (https://simtk-confluence.stanford.edu/display/OpenSim/Simulation-Based+Design+to+Reduce+Metabolic+Cost). Now I would like to see the Tension and l...
by Pia Stefanek
Fri Jun 22, 2018 12:55 am
Forum: OpenSim
Topic: Torsional Spring
Replies: 2
Views: 405

Re: Torsional Spring

Thank you very much for your answer. I think I understood the Parameters now. But could you tell me if it is possible to calculate the resulting torque curve when applying the torsional spring during Walking? I really want to understand how the torsional spring works so I tried to simulate a constan...
by Pia Stefanek
Sun Jun 17, 2018 3:46 am
Forum: OpenSim
Topic: Induced Acceleration Analysis
Replies: 0
Views: 223

Induced Acceleration Analysis

Hi, I tried to make an Induced Accelerations Analysis but I always get the same mistake in OpenSim: Loading states from file E:\Biomedical Engineering\masterarbeit\Selbst gemacht\torsionalanklespring\Ohne\walk_subject01_knee_spring_knee_spring_states.sto. Storage: file=E:\Biomedical Engineering\mast...
by Pia Stefanek
Thu May 24, 2018 8:15 am
Forum: OpenSim
Topic: Torsional Spring
Replies: 2
Views: 405

Torsional Spring

Hi, I want to model a torsional spring as described in https://simtk-confluence.stanford.edu/display/OpenSim/Simulation-Based+Design+to+Reduce+Metabolic+Cost for the knee Joint. Could someone explain the variable Parameters: upper/lower Limit/stiffness. If I unterstood correctly then the lower and u...