Search found 9 matches

by Giacomo Di Raimondo
Tue Feb 15, 2022 2:00 am
Forum: STO / TRC / MOT files plotter
Topic: STO / TRC / MOT files plotter Public Forum
Replies: 1
Views: 533

Re: STO / TRC / MOT files plotter Public Forum

Hello, I'm using your function and thanks for having done it! I found only a little problem in "array2table" because if you have a VariableNames, C with some repetitions (e.g. {'X', 'Y', 'Z', 'X', 'Y', 'Z'}) cannot work. So the function cannot convert in table format and stop. You can add an if or o...
by Giacomo Di Raimondo
Wed Jan 05, 2022 1:54 am
Forum: OpenSim
Topic: OpenSim JAM "computePotentialEnergy"
Replies: 1
Views: 870

OpenSim JAM "computePotentialEnergy"

Hi all, I'm working with OpenSim JAM, developed by Colin Smith. I was trying to calculate the contact energy between the cartilage mesh with the function "computePotentialEnergy". It requires as input an opensim.modelling.State element and give as output a double number. I don't understand if the st...
by Giacomo Di Raimondo
Tue Jun 02, 2020 12:48 am
Forum: OpenSim
Topic: OpenSense Calibration Method
Replies: 1
Views: 342

OpenSense Calibration Method

Hi, I'm comparing the Inverse Kinematics of OpenSense with the IK of the standard OpenSim pipeline (OS - Vicon). My firsts results show a sort of offset angle between the two methods. Did someone compare the IKs (OS vs IMU)? I'd like to understand better the calibration method in OpenSense. Is there...
by Giacomo Di Raimondo
Fri May 15, 2020 3:19 am
Forum: OpenSim
Topic: OpenSense XSens text files
Replies: 5
Views: 1140

Re: OpenSense XSens text files

Hi Amy, Thanks for your help. I completely agree. I was working with the segment quaternions but I had problems, the calibration results in a parallel configuration of the sensors inside the OpenSim model without any sense. Now, you confirmed what I thought: the segment orientation is different from...
by Giacomo Di Raimondo
Thu May 14, 2020 2:10 am
Forum: OpenSim
Topic: OpenSense XSens text files
Replies: 5
Views: 1140

Re: OpenSense XSens text files

Hi Ayman, I tried to convert mvnx format in txt to verify that there are no differences between the segment orientation already calculated with Xsens (in the mvnx file) and the sensor orientation in txt format. But for now, I found completely different results. Is it possible to convert MNVX (sensor...
by Giacomo Di Raimondo
Fri Apr 24, 2020 12:16 am
Forum: OpenSim
Topic: OpenSense Calibration
Replies: 5
Views: 510

Re: OpenSense Calibration

IMU_on_model.PNG
IMU_on_model.PNG (313.4 KiB) Viewed 365 times
by Giacomo Di Raimondo
Thu Apr 23, 2020 5:21 am
Forum: OpenSim
Topic: OpenSense Calibration
Replies: 5
Views: 510

Re: OpenSense Calibration

Hi Habib In did the calibration procedure with Matlab, in my case I have the -z axis as the forward one, but when I defined (-pi/2, 0, 0) as my rotation, what I get in the calibrated model is different (see picture attached). Is this because the -z axes is not perfectly aligned with x? How do I know...
by Giacomo Di Raimondo
Fri Apr 17, 2020 2:17 am
Forum: OpenSim
Topic: OpenSense Calibration
Replies: 5
Views: 510

Re: OpenSense Calibration

Hi, I was wondering how did you show the reference system of each IMUs in your model on OpenSim? It's really useful. Thanks
by Giacomo Di Raimondo
Thu Apr 09, 2020 8:40 am
Forum: OpenSim
Topic: OpenSense Calibration file
Replies: 0
Views: 162

OpenSense Calibration file

Hello to the OpenSim forum and community. I started to use the OpenSense tool and the kinematic results compared with the stardard pipeline of OpenSim seem really promising. I collected my dataset with Xsens sensors, and I have all of them .mvnx format. Xsens company provides a tool fro load and rea...