Search found 1375 matches

by jimmy d
Sat Dec 05, 2020 3:04 pm
Forum: OpenSim
Topic: Google Colab & MATLAB & OpenSim 4.1
Replies: 1
Views: 1279

Re: Google Colab & MATLAB & OpenSim 4.1

Is it suitable for MATLAB ? If it is, how can I run my script through Google Colab.
Google Colab isn't usable for Matlab-OpenSim simulations
by jimmy d
Thu Jun 04, 2020 4:48 am
Forum: OpenSim
Topic: Scaling Issues
Replies: 2
Views: 1341

Re: Scaling Issues

by jimmy d
Mon Feb 24, 2020 7:25 pm
Forum: OpenSense
Topic: Theory and Publications
Replies: 1
Views: 1366

Re: Theory and Publications

There is no OpenSense paper yet. There are plenty of papers on Pubmed that describe how IMUs compute their own quaternion orientation-- I would suggest doing a literature review there on data fusion of IMUs. OpenSense doesn't compute quaternions-- it uses the available quaternion information from th...
by jimmy d
Mon Feb 24, 2020 7:17 pm
Forum: OpenSim
Topic: Rajagopal model length
Replies: 1
Views: 1212

Re: Rajagopal model length

Just because the Human Subject was 170cm tall, doesn't mean the model will be. There are differences in tissue thickness at the foot and head alone that could account for the 5cm difference (the subject could have also been wearing shoes). The model also uses some generic Geometry files (torso and h...
by jimmy d
Mon Feb 24, 2020 7:14 pm
Forum: OpenSim
Topic: parameter difference 2392 model and scaled model
Replies: 2
Views: 1227

Re: parameter difference 2392 model and scaled model

When scaling a model, only the optimal fiber length gets scaled since it is unknown what the other how the other parameters map to the size of the subject. It is up to you to alter the remaining parameters for your subject.
by jimmy d
Wed Dec 18, 2019 11:47 am
Forum: OpenSim
Topic: Body::getJoint() method removed from OpenSim 4.0
Replies: 1
Views: 1439

Re: Body::getJoint() method removed from OpenSim 4.0

Hi, Alex- Good question. I'll give some context on why getJoint() doesn't exist anymore; prior to 4.0, joints were always contained inside bodies. From 4.0, we moved to a Component architecture and so Bodies and Joints are their own components. Joints have sockets that take Frames, which can be a bo...
by jimmy d
Wed Dec 18, 2019 10:52 am
Forum: OpenSim
Topic: Changing muscle insertion point
Replies: 2
Views: 1263

Re: Changing muscle insertion point

Yes. You can get the muscles Geometry path, which holds the path points.
by jimmy d
Wed Dec 18, 2019 10:40 am
Forum: OpenSim
Topic: RRA fails without any error communicate
Replies: 2
Views: 1265

Re: RRA fails without any error communicate

The issue with Excel is that it wants to change the line endings, which are incompatible with OpenSim. You should try editing the file in a text based editor (Notepad++, Atom, Sublime text) since they tend to keep the line endings the same.
by jimmy d
Mon Dec 16, 2019 8:34 am
Forum: OpenSim
Topic: Scaling
Replies: 2
Views: 1496

Re: Scaling

There is a paper and Webinar on verification and validation that you should spend some time going through.
by jimmy d
Mon Dec 16, 2019 8:29 am
Forum: OpenSim
Topic: Muscle names of a particular group
Replies: 2
Views: 1425

Re: Muscle names of a particular group

Groups are managed by the Set(), you can find the methods here;
https://simtk.org/api_docs/opensim/api_ ... _1Set.html