Can I scale XSENS IMU data in OpenSim Creator?

[adamkewley]

Question ported from [email protected]. Some details may be REDACTED/edited because the original question was private.

We have collected walking data from healthy human subjects utilizing the XSENS MVN IMU sensors. We plan to scale one of the OpenSim models (e.g., Gait2392) based on the subject dimensions and the collected data and use the Inverse dynamic. But we need some help converting these data to be readable by the OpenSim and using them in scaling and Inverse dynamic tools. How could we do this?

[adamkewley]

I haven't personally worked with IMU data in OpenSim. I hear about it sometimes (via users in my team), but OpenSim Creator hasn't addressed IMU tooling (as of 0.5.11, at least 😉).

From what I hear, the general procedure for importing your data to OpenSim will probably involve using OpenSense, which is a module of OpenSim that handles IMU data:

https://simtk-confluence.stanford.edu:8443/display/OpenSim/OpenSense+-+Kinematics+with+IMU+Data

XSENS sensors are very common among the researchers I've seen using IMUs with OpenSim, so I believe that you should be able to get your data into the system. One common problem that students etc. tend to encounter is that the frame axis ordering of some XSENS sensors doesn't quite match OpenSim, which usually requires shuffling things around during the import step.

There's also appropriate IMU tooling in the official OpenSim GUI but, again, I haven't personally worked on it, or used it.