how to use Accelerometer raw data to Estimate Position and Velocity

edited January 18 in Hardware

I used MMR from mbientlab, I have 3D raw Accelerometer data (in g).
1. I need to find the velocity and position from it using Matlab. I used the integration once and twice but I'm not quite sure with the results. I guess I missed something like DC offset, increasing the error due to integration, etc.?
2. Do I need to filter the data at some stages?

any help?

Comments

    1. I need to find the velocity and position from it using Matlab. I used the integration once and twice but I'm not quite sure with the results. I guess I missed something like DC offset, increasing the error due to integration, etc.?

    This is not an easy solve. There are many white papers on this subject and I suggest reading through them.

    1. Do I need to filter the data at some stages?

    I recommend filtering the raw accelerometer data with a filter and maybe an averager. The white papers will also tell you what they did to clean up the data.

    Here is an example: http://www.chrobotics.com/library/accel-position-velocity

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