Hi all,
I have obtained some raw IMU data from a peer in an Excel tabular format to assess the quality of a specific human movement. My ultimate goal is to determine the position of the wristworn IMU and produce a visual trace of it.
However, early days yet. I have seen conflicting evidence as to whether I need to remove the influence of gravity or not. So I suppose question 1 is whether I need to remove the influence of gravity to get the correct acceleration of the IMU body?
Question 2, and my primary question, if I do need to remove the influence of gravity, can I do the following?:
- Convert the gyroscope data from angular velocity (deg/s) to get the angle (deg) to represent pitch, yaw and roll by multiplying by time. I have a sample rate of 100Hz so this would mean t=0.01.
- Apply trig to remove the instantaneous influence of g on each of the x, y and z axes.
If this is unsuitable, please could you advise an alternative way of approaching this? I have access to MATLAB but lack experience, so hopefully it won't be too complex!
Kind regards
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