I am a beginner to use BTK toolbox and try to extract the analog data from c3d files (generated from Vicon Nexus) and in my case I am using a perturbation platform to measure the dynamic balance. When i used the BTK tool kit to extract the force and moments, It inverts the data and I get a Matlab warning as below
"Warning: Origin for the force platform #1 seems to be located from the center of the working surface instead of the inverse. Data are inverted to
locate the center of the working surface from the platform's origin.
Warning: Origin for the force platform #2 seems to be located from the center of the working surface instead of the inverse. Data are inverted to
locate the center of the working surface from the platform's origin."
I am not very sure why it is this way. Also, I am not very sure how to calculate the joint angles during the perturbation as the time frame is very small. If someone has any idea on this issue,would be great. Thank You in advance.
Kind Regards,
Suren