Search found 47 matches

by Ali Khalilianmotamed Bonab
Tue Oct 18, 2022 4:00 am
Forum: OpenSim
Topic: Converting MVNX quaternions to .STO file
Replies: 5
Views: 848

Re: Converting MVNX quaternions to .STO file

Thank you so much for your help. It resolved my issue and I am sharing the code below in case someone needs it: fid = fopen('../Experimental_Data/OpenSim_IMU_Dataset.sto','w+'); fprintf(fid,'DataRate=240.000000\nDataType=Quaternion\nversion=3\nOpenSimVersion=4.3\nendheader\n'); fprintf(fid,'time\t%s...
by Ali Khalilianmotamed Bonab
Mon Oct 17, 2022 9:43 am
Forum: OpenSim
Topic: Converting MVNX quaternions to .STO file
Replies: 5
Views: 848

Re: Converting MVNX quaternions to .STO file

Thank you so much for your reply. I have already checked the example file. I am using MVN instead of the MT system, which already gives the sensors' orientation as quaternions instead of raw sensors' orientation/acceleration data. Therefore, "IMUDataConversion.m" does not work for my system. My ques...
by Ali Khalilianmotamed Bonab
Mon Oct 17, 2022 1:33 am
Forum: OpenSim
Topic: Converting MVNX quaternions to .STO file
Replies: 5
Views: 848

Re: Converting MVNX quaternions to .STO file

As I have not received any recommendation, I am replying to request your guidance regarding this matter.
by Ali Khalilianmotamed Bonab
Fri Oct 14, 2022 2:29 am
Forum: OpenSim
Topic: Converting MVNX quaternions to .STO file
Replies: 5
Views: 848

Converting MVNX quaternions to .STO file

Dear OpenSim Community, I am using the MVN link and MVN analyzer system to record the motion data. This system directly provides the orientation of sensors as a .XLSX file. My problem is with converting the data to the format required by OpenSim .STO: - MVN Analyzer provides all data in MVNX format ...
by Ali Khalilianmotamed Bonab
Thu Dec 19, 2019 12:58 pm
Forum: OpenSim
Topic: Creating a Custom Actuator in OpenSim
Replies: 1
Views: 249

Creating a Custom Actuator in OpenSim

Dear Opensim experts, We have a dynamic model of an actuator (+ mechanism) and we want to implement this actuator in the OpenSim environment to be used in the musculoskeletal model. I would be very grateful if you could guide me about how we can construct our specific actuator with its own dynamics ...
by Ali Khalilianmotamed Bonab
Thu Nov 14, 2019 1:58 am
Forum: OpenSim
Topic: Jacobian between two joints
Replies: 2
Views: 219

Jacobian between two joints

Dear OpenSim Experts, I assigned an actuator to the torso and now want to get its torque profile in another frame. I would be grateful if you could help me with the following issue: Is any specific command in OpenSim API to do this transformation? If there is no such command, is it possible to get t...
by Ali Khalilianmotamed Bonab
Fri Oct 25, 2019 3:13 am
Forum: OpenSim
Topic: AnalyzeTool Error
Replies: 2
Views: 446

AnalyzeTool Error

Dear Opensim Experts, I am trying to run analyzetool using Matlab. In some cases, I am encountering the following error which I could not figure out its reason. According to the message, states.sto file is not matching with the model states but I did not make any changes on the state files. It would...
by Ali Khalilianmotamed Bonab
Tue Oct 08, 2019 8:50 am
Forum: OpenSim
Topic: Scaling Geometry, Weight and Inertia of a New added Body
Replies: 11
Views: 1439

Re: Scaling Geometry, Weight and Inertia of a New added Body

Thanks, Dr. stanev for your kind helps and patience,
I will discuss about the alternatives with my professor to find a way to move forward.
Sincerely,
Ali.
by Ali Khalilianmotamed Bonab
Tue Oct 08, 2019 6:32 am
Forum: OpenSim
Topic: Scaling Geometry, Weight and Inertia of a New added Body
Replies: 11
Views: 1439

Re: Scaling Geometry, Weight and Inertia of a New added Body

Thanks again for your reply,
So, do you recommend to not model the bodies of exoskeleton with inertial properties and perform ideal exoskeleton cases similar to their work?
by Ali Khalilianmotamed Bonab
Mon Oct 07, 2019 3:48 pm
Forum: OpenSim
Topic: Scaling Geometry, Weight and Inertia of a New added Body
Replies: 11
Views: 1439

Re: Scaling Geometry, Weight and Inertia of a New added Body

Thanks for your reply Dr. Stanev, I am trying to use the Loaded walking model and data https://simtk.org/projects/assistloadwalk . My aim is to model some exoskeletons that we have designed on this model with all inertia and masses to perform the simulations. 1) I am adding bodies to the previously ...