Search found 5 matches

by Rachel Jackson
Mon May 19, 2014 2:59 pm
Forum: OpenSim
Topic: Plotting Muscle Fiber Length and Force outside Opensim
Replies: 6
Views: 2415

Re: Plotting Muscle Fiber Length and Force outside Opensim

Hi Ali, When I compare the "total fiber forces" to the "tendon forces" in the opensim environment they are not necessarily the same (depending on the muscle I am looking at). I figured this had to do with the definition of the pennation angle...is this correct? What do I need to specify in my .xml f...
by Rachel Jackson
Mon May 19, 2014 8:33 am
Forum: OpenSim
Topic: Plotting Muscle Fiber Length and Force outside Opensim
Replies: 6
Views: 2415

Plotting Muscle Fiber Length and Force outside Opensim

Hi all, I am running CMC to try to understand muscle forces and length changes in different experimental conditions. I found that you can look at muscle fiber forces and lengths separate from the tendon, in the Opensim environment. I was wondering if this data was stored in any output file that coul...
by Rachel Jackson
Mon May 19, 2014 8:29 am
Forum: OpenSim
Topic: Applying External Forces/Torques from a device/exoskeleton
Replies: 6
Views: 2519

Re: Applying External Forces/Torques from a device/exoskelet

Thank you, Dominic!

I actually implemented something very similar to what you suggested. I just added equal and opposite torques applied to the tibia and calcaneus to the external loads file.

Best,
Rachel
by Rachel Jackson
Wed May 07, 2014 5:45 am
Forum: OpenSim
Topic: Applying External Forces/Torques from a device/exoskeleton
Replies: 6
Views: 2519

Applying External Forces/Torques from a device/exoskeleton

Hi! I was wondering if anyone knew how to add an additional torque applied from an external device, such as an ankle exoskeleton? In our experiments, subjects wore an ankle exoskeleton that applied plantarflexor torques about the ankle and I wanted to add this into my OpenSim model so the resulting ...