Incorrect position calculation from IMU for gait analysis
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Hello All, i am trying to do gait analysis using an IMU. I am using a zero velocity update algorthm to force the food valeocity to zero when it is stationary. The final position i am calcualting is less than what i am expecting, and there is a change in position in axis where there should not be. Does anyone have any ideas as to why this my be the case? Ive attached a picture after of the position plot after i walked 8 meters with an IMU strapped to my foot.
The IMU i am using also outputs quaternions (if that is helpful?)
Thank you for any help
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/385963/image.png)
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James Tursa
2020-10-20
You will need to show us the algorithm/code you are using. Yes, you need to use the quaternion data to orient the acceleration values in order to get proper displacement calculations.
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