Search found 47 matches

by Rahul Agrawal
Mon Jul 16, 2018 6:58 am
Forum: OpenSim
Topic: Defining Joint Motion using Generalized Cordinates
Replies: 3
Views: 718

Re: Defining Joint Motion using Generalized Cordinates

Hi Dimitar, Thank you for your reply. In my case theta and p are independent of each other as I am prescribing motion from located position to dislocated position for humerus. Do you think is there any way to implement this eg (modelling 6 DOF with 6 different joints at the same location and prescri...
by Rahul Agrawal
Fri Jul 13, 2018 2:30 pm
Forum: OpenSim
Topic: Defining Joint Motion using Generalized Cordinates
Replies: 3
Views: 718

Defining Joint Motion using Generalized Cordinates

Hello Everyone, I am using 6DOF custom joint between scapula and humerus to stimulate dislocation. I have generated trajectory in Matlab i.e. translation XYZ and rotation Euler angles. Opensim requires generalized coordinate as an input for prescribing joint motion. Does anyone know how I can implem...
by Rahul Agrawal
Tue Jul 10, 2018 7:48 am
Forum: OpenSim
Topic: 3D Rotation Matrix
Replies: 1
Views: 511

3D Rotation Matrix

Hello, I have been using custom joint between humerus and scapula, I have generated the trajectory of the humerus in matlab using 3D rotation Matrix( see the attached file). When I use those trajectory to rotate humerus in opensim, it rotates completely different , I don't know whether I have to con...
by Rahul Agrawal
Tue Jul 03, 2018 7:12 am
Forum: OpenSim
Topic: Prescribed_Function_error
Replies: 1
Views: 466

Prescribed_Function_error

Hello, I am trying to use prescribed function to move the coordinate joint in the desired position using FD tool. I have been using <PiecewiseLinearFunction> <x> 0 1 2 3 4 5 6</x> <y>0.054530 0.193382 -0.0007 -0.00630 0.01611 0.02281 0.02328</y> </PiecewiseLinearFunction> After running the FD tool i...
by Rahul Agrawal
Mon Jul 02, 2018 9:20 am
Forum: OpenSim
Topic: CustomLigament_Plugin
Replies: 1
Views: 257

CustomLigament_Plugin

Hello,

I am trying to use custom ligament plugin from"ACL Reconstruction Decision Support Through Personalized Simulation of the Lachm" Project.
There is no .dll file for plugin to use in the download section. They have .rar file, any possible way to use .rar as plugin?

Thank you!

Regards,
Rahul
by Rahul Agrawal
Thu Jun 28, 2018 6:47 am
Forum: OpenSim
Topic: Forward Dynamic _result error
Replies: 1
Views: 492

Forward Dynamic _result error

Hello Everyone, I have created a shoulder model having path spring (i.e. Ligament) attached to the shoulder. I am using prescribed function to move the joint by running the forward dynamics. Simulation runs for the defined time period (i.e. 4 sec) without any error, but the body segment attached to ...
by Rahul Agrawal
Tue Jun 26, 2018 7:18 am
Forum: OpenSim
Topic: Importing .stl file
Replies: 4
Views: 880

Re: Importing .stl file

Thank you for your response.

I will try using any point or markers in GUI.
by Rahul Agrawal
Mon Jun 25, 2018 6:27 am
Forum: OpenSim
Topic: Importing .stl file
Replies: 4
Views: 880

Re: Importing .stl file

Thank you for your reply.

The scale is set to 1 1 1. Changing it to 0.005 0.005 0.005 make it look reasonable with coordinate axis of opensim.
Scaling it 0.005 does not make sense since the geometry becomes extremely small.

Any suggestion what can I do ?

Regards,
Rahul
by Rahul Agrawal
Fri Jun 22, 2018 9:02 am
Forum: OpenSim
Topic: Importing .stl file
Replies: 4
Views: 880

Importing .stl file

Hello All, I have an query when I import the geometry (.stl) having length of 314 mm in opensim, the visual coordinate axis in opensim goes extremely small. It makes me feel the geometry is extremely big but it is not. Can anyone tell me the potential problem for this and how to solve that. Thanks i...
by Rahul Agrawal
Mon Jun 04, 2018 6:02 am
Forum: OpenSim
Topic: Potential Energy of Ligament
Replies: 2
Views: 431

Re: Potential Energy of Ligament

Thank you for your response. I know I can customize the ligament, but I don't know what input function (xml) are required in the model to get potential energy (P.E.) from FD tool. Something like below will work? <SystemEnergyProbe> <!--Flag indicating whether the Probe is disabled or not.--> <isDisa...