Search found 48 matches

by Pia Stefanek
Thu Oct 11, 2018 11:58 am
Forum: OpenSim
Topic: Simulation results - Force of m.psoas
Replies: 3
Views: 246

Re: Simulation results - Force of m.psoas

Thank you for your answer. I'm sorry I did not mention that the simulation is performed during walking and not stance. In this phase of the gait cycle (terminal stance to initial swing) the knee and the hip flex. I plotted the hip and knee angles and the spring force. From these two pictures I can s...
by Pia Stefanek
Thu Oct 11, 2018 3:16 am
Forum: OpenSim
Topic: Simulation results - Force of m.psoas
Replies: 3
Views: 246

Simulation results - Force of m.psoas

Hi, I have a question concerning the results of my studies: I have weakened the rectus femoris (reduced the controls to 10% of their maximum value) and implemented a path spring parallel to the rectus femoris muscle in the model 'Gait2354' to support the weakened muscle. I focused on the phase termi...
by Pia Stefanek
Fri Sep 28, 2018 8:43 am
Forum: OpenSim
Topic: Problems performing IAA with Gait2354 model
Replies: 5
Views: 637

Re: Problems performing IAA with Gait2354 model

This is the Setuo File I used. Maybe it contains a mistake?
by Pia Stefanek
Wed Sep 26, 2018 12:47 pm
Forum: OpenSim
Topic: Problems performing IAA with Gait2354 model
Replies: 5
Views: 637

Re: Problems performing IAA with Gait2354 model

I thought About this Posting: https://simtk.org/plugins/phpBB/viewtopicPhpbb.php?f=1398&t=8339&p=0&start=0&view= But Maybe I did not understand it correctly. When I don't Change the external load file from Point force to Body force, I get valid results for the constraint reaction Forces which match ...
by Pia Stefanek
Wed Sep 26, 2018 12:55 am
Forum: OpenSim
Topic: Problems performing IAA with Gait2354 model
Replies: 5
Views: 637

Problems performing IAA with Gait2354 model

Hi, I am trying to make an IAA with the model 'Gait2354_Simbody'. I have already made an IAA with the model 'Gait10dof18musc'. I found out that one has to Change the external loads file from Point force to Body force (applied to Calcaneus) to get valid results in the induced constraints file. (https...
by Pia Stefanek
Wed Sep 26, 2018 12:14 am
Forum: OpenSim
Topic: Difference between Gait Models
Replies: 2
Views: 180

Re: Difference between Gait Models

Thank you very much :)
by Pia Stefanek
Mon Sep 24, 2018 9:54 am
Forum: OpenSim
Topic: Difference between Gait Models
Replies: 2
Views: 180

Difference between Gait Models

Hi,

Could somebody explain me the difference between the Models 'subject01_simbody' and 'subject01_scaledOnly'?
And when do I have to perform RRA in my analysis?

Thank you very much.

Regards

Pia
by Pia Stefanek
Wed Sep 05, 2018 5:18 am
Forum: OpenSim
Topic: Change isometric force of muscles
Replies: 1
Views: 328

Change isometric force of muscles

Hi, I implemented a path spring parallel to the rectus femoris muscle in the Gait10dof18musc model. Now I want to weaken the isometric force of the rectus femoris muscle to see the effect of the spring. In the model the rectus femoris has a maximum isometric force of 1.169N. I changed it to 292.25N ...
by Pia Stefanek
Mon Aug 20, 2018 2:02 am
Forum: OpenSim
Topic: Verifying IAA induced constraints
Replies: 1
Views: 279

Verifying IAA induced constraints

Hi, I try to do a verification of induced constraints (rolling-without-slipping) versus experimental GRF, during Walking. I have a Problem with the verification of the Moments/Torques. I read the post of Adam Yoder (https://simtk.org/plugins/phpBB/viewtopicPhpbb.php?f=1398&t=8339&p=0&start=0&view=&s...
by Pia Stefanek
Thu Aug 09, 2018 2:05 am
Forum: OpenSim
Topic: Report constraint reactions IAA
Replies: 0
Views: 186

Report constraint reactions IAA

Hi, I am working with the model 'Gait10dof18musc'. I am interested in the muscle contributions to the accelerations, so I performed a Induced Acceleration Analysis. To run the IAA I think I need to add the Rolling on Surface Constraint. I made a Setup File, which I attached to this message. I also a...