Kinematics and Inverse Dynamics analysis failed

Hi, I am new to Anybody modelling simulation, and I am using Anybody version 8.0. I have collected walking data in BTS bioengineering Gait Laboratory system using the Helen Hayes protocol (18 markers) and exported the file as C3D format. I have also changed the marker names as per the markerprotocol.any file and have also included the 4 force plates used and its type in forceplates.any file. In the process of generating the inverse dynamics through pluginsimplegait repository files of full body or lower body main.any file, I am encountering the below errors. It is noted that however my kinematic analysis is executed (with upper body of the model seems to be bending while walking) and it fails in inverse dynamics analysis with a error
"Overloaded muscle configuration: muscle recuitment solver". I am attaching the picture of error occured.
Kindly, provide the solution on how to excute the C3D file in the Anybody 8.0.


Hi Vinoth,

Judging from your description and images I can think of these items to check:

  • Gravity direction of the inverse study is it correct?
  • I can see the the model stands outside the plates, this means that in this position it does not have support, the residual forces acting on pelvic should carry the model
  • It is hard to see on the image but it may look like you have enabled the detailed hand, try to disable that if this is the case to simplify the model.
  • In the model without arms I can see that the error says it did not complete the kinematics correctly.
  • If you start the analysis of the very first frame of the data it can lead to interpolation artifacts that may induce accelerations to the model, to avoid this change the start and end frames in the trialspecific file so that you crop e.g. 10-20 frames in both ends.

Hope it helps

Best regards
Søren

Hi Sir,
Thanks for your suggestions. I have gone through all your points and also made some changes in the sacrum marker position. Finally, the kinematics & inverse dynamics study was executed properly.