Search found 32 matches
- Thu Feb 17, 2022 11:53 am
- Forum: Open Knee: A Three-Dimensional Finite Element Representation of the Knee Joint
- Topic: Generation 1 Cut Planes
- Replies: 2
- Views: 1207
Re: Generation 1 Cut Planes
Okay thank you!
- Thu Feb 17, 2022 8:22 am
- Forum: Open Knee: A Three-Dimensional Finite Element Representation of the Knee Joint
- Topic: Generation 1 Cut Planes
- Replies: 2
- Views: 1207
Generation 1 Cut Planes
Hello, I am interested in using the geometry files of the Generation 1 Open Knee model. I am curious how the cut planes were defined for both the femur and the tibia. Are they perpindicular to the mechanical axis of the bones? Or are they arbitrary and made during the segmentation of the MRI scans? ...
- Sat Nov 20, 2021 9:21 pm
- Forum: OpenSim
- Topic: OpenSim Joint Angles
- Replies: 3
- Views: 751
Re: OpenSim Joint Angles
Hi Thomas, Yes I am referring to inverse kinematics. To give some context, I am attempting to compare OpenSim joint angles to those calculated using the typical method of anatomical coordinate frames. I believe my confusion is coming from determining what would cause differences between the weighted...
- Fri Nov 19, 2021 6:51 pm
- Forum: OpenSim
- Topic: OpenSim Joint Angles
- Replies: 3
- Views: 751
OpenSim Joint Angles
Hello, I have a few questions in regards to how joint angles are calculated in OpenSim. I have looked through the SimTK theory manual but still have some confusion. 1. What method is used to calculate joint angles? Is it quaternions, Euler Angles, or another method? 2. If Euler angles are used how c...
- Sun Sep 12, 2021 8:26 am
- Forum: OpenSim
- Topic: Piecewise Coefficient
- Replies: 1
- Views: 240
Piecewise Coefficient
Hello,
I am interested in modifying/creating new models and am curious about how the piecewise linear function constants are determined for different joint constraints. Are there any resources that would help explain where these constants are coming from?
Thanks,
I am interested in modifying/creating new models and am curious about how the piecewise linear function constants are determined for different joint constraints. Are there any resources that would help explain where these constants are coming from?
Thanks,
- Sun Jul 25, 2021 2:29 pm
- Forum: OpenSim
- Topic: Inertia matrix for modified body
- Replies: 0
- Views: 227
Inertia matrix for modified body
Hello, I am currently modifying a custom model which only utilized one side of a sheep pelvis. I have mirrored the geometry of the original pelvis to create a single full pelvis geometry file. My question involves the modification of the inertia matrix to account for the change in dynamics as the pe...
- Wed Jul 21, 2021 2:24 pm
- Forum: OpenSim
- Topic: Inverse dynamics not writing output file
- Replies: 2
- Views: 350
Re: Inverse dynamics not writing output file
Hi Ayman,
Yes, removing the specific file path on the output_gen_force_file did the trick.
Thanks
Yes, removing the specific file path on the output_gen_force_file did the trick.
Thanks
- Wed Jul 21, 2021 7:18 am
- Forum: OpenSim
- Topic: Inverse dynamics not writing output file
- Replies: 2
- Views: 350
Inverse dynamics not writing output file
Hello, I am attempting to setup the inverse dynamics tool via python to run ID on multiple models and trials. I have gotten the inverse dynamics tool to run as I receive a 'True' when using the run() method. However, I am not seeing any .sto file being created despite having the results directory an...
- Thu Jul 15, 2021 7:11 am
- Forum: OpenSim
- Topic: Multiple Time Ranges for Inverse Dynamics Force Data
- Replies: 1
- Views: 285
Multiple Time Ranges for Inverse Dynamics Force Data
Hello, I am running inverse dynamics and have 4 force plates that were used during data collection. I would like to specify a time range for each individual force plate. For example, if my trial is 4 seconds long, I would like force plate #1 to be used for the entirety of the trial, but only use dat...
- Wed Jul 14, 2021 8:14 am
- Forum: OpenSim
- Topic: Rotate Experimental Data Through Python API
- Replies: 2
- Views: 330
Re: Rotate Experimental Data Through Python API
Update: I ended up just writing a custom script to rotate my trc files.