Acceleration computation

[Riccardo Bertoglio]

Hi, can you exaplain why you multiply the earth acceleration by the gravitational acceleration (9.81)?

Gait-Tracking/gait_tracking.py

Line 64 in ccc5521

 acceleration[index] = 9.81 * ahrs.earth_acceleration  # convert g to m/s/s 

[x-io Technologies]

To convert from g to m/s/s, as stated in the comment.

[Riccardo Bertoglio]

Yes, of course, I read the comment. But what does it mean to convert g to m/s/s? g is already in m/s/s and what does it mean to multiply g by the earth acceleration you computed?

[x-io Technologies]

"g is already in m/s/s" is like saying miles is already in kilometres. The units of ahrs.earth_acceleration are g. This is converted to m/s/s so that velocity will be in m/s, and position will be in m.

[Riccardo Bertoglio]

I see, thank you!

[zhang1796183796]

hi,how the gyroscope in used in acceleration computation?