Hello Opensim community! :) I am planning a pilot test (motion capture, 2 force plates, and emg) for walking with cane on both hand. For external forces from cane, I plan to install a single axial force transducer on the end of the cane to get force between cane and ground. And, I plan to put additi...

Hello, I am currently working on a project where I need to obtain real-time inverse kinematics outputs using MATLAB, specifically utilizing the OpenSim API. I have successfully managed to gather real-time marker trajectories from a motion capture system within MATLAB. However, I am now faced with th...

Hello OpenSim friends, :) I am Hoon Kim. I have a challenge for the use of OpenSim. I am planning a research where we will evaluate upper body exoskeleton in terms of muscle activation and muscle forces. For this study, I think that we need some steps: 1. Adding the exoskeleton segment with inertia ...

Hello, I am Hoon in South Korea. I tried to run the muscle line of action plugin and I successfully extracted the results (e.g., attachment position, vector). But, I don't know how to visualize them in OpenSim viewer. Could you briefly let me know how to visualize them in OpneSim? If it is not possi...

Hello, I collected a walking trial using OpenCap. I ran kinetic.py file after some changes (e.g., session name, trial name, etc.). After 540 iterations, I got kinetic data (e.g., GRF, muscle forces, joint reaction forces, etc.) from one stance phase of walking. I checked the resultant ground reactio...

Hi Scott,

Thank you so much for your detailed comments! It is really helpful for me to understand the output including noise!
Have a great day.

Thanks,

Hoon

Hello, I tried to get kinematics of squats using OpenCap. It was nice and I got kinematics and model files. One thing I am wondering is that "why my kinematics has vibration (I attached a figure of kinematic data). It looks like squat on the whole-body vibration device :) Can I get any advice to get...

Thank you for the tips. Could you help me apply the joint moment calculated by inverse dynamics to IAA? I removed all muscle forces and added CoordinateActuator in the model. Then, I tried to add jointmoment.sto (ID results) to the control file in the IAA set file. But, I think that doesn't work bec...

Dear all, I have several experiences to use IAA to calculate contributions of individual muscles to the acceleration of COM. While I am using IAA, I was wondering if there is a way to calculate the contribution of each JOINT MOMENT to the acceleration of COM. I would be so happy to hear any comments...

Thank you so much for your tips.
I have a quick question about your tips.
Does the code (e.g., printMuscleCurveToCSVFile()) works for OpenSim 3.3?
Thank you.

Sincerely,

Hoon