Knee joint contact loads using Joint reaction analysis
Posted: Tue Apr 25, 2023 6:55 pm
Hi everyone
I intend to find the knee joint contact loads using the Joint Reaction analysis tool in Opensim 4.3. I have obtained the muscle forces using CEINMS hybrid model.
I obtained the reserve actuators file from running the MATLAB script createActuatorsFile.m file included in the resources folder. Not really sure if I am correct. I have included all the files here .
However, when i run the JRA tool i get unrealistic results as in figure 1
. These results are same even if i change the forces file here or the actuators. Its always the same.
Also, the messages window in OpenSim shows
Found 60 actuator forces with time stamps ranging from 2.19to 4.85.
The forces file does not contain enough actuators.
Actuator forces will be constructed from the states.
Printing results of investigation 65 to C:\Users\DELL\...
Also, i have 3 separate externalload.xml files since, i have 3 force plates and want to consider foot contacts with all so I repeat the JRA analysis 3 times with 3 different external load files.. Can this be a problem?
Any help would be much appreciated.
Regards
Zakia
I intend to find the knee joint contact loads using the Joint Reaction analysis tool in Opensim 4.3. I have obtained the muscle forces using CEINMS hybrid model.
I obtained the reserve actuators file from running the MATLAB script createActuatorsFile.m file included in the resources folder. Not really sure if I am correct. I have included all the files here .
However, when i run the JRA tool i get unrealistic results as in figure 1
. These results are same even if i change the forces file here or the actuators. Its always the same.
Also, the messages window in OpenSim shows
Found 60 actuator forces with time stamps ranging from 2.19to 4.85.
The forces file does not contain enough actuators.
Actuator forces will be constructed from the states.
Printing results of investigation 65 to C:\Users\DELL\...
Also, i have 3 separate externalload.xml files since, i have 3 force plates and want to consider foot contacts with all so I repeat the JRA analysis 3 times with 3 different external load files.. Can this be a problem?
Any help would be much appreciated.
Regards
Zakia