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Visitor II
June 26, 2019
Question

motion fx library running at 100hz giving wrong orientations when the device attached to it rotates at faster speeds

  • June 26, 2019
  • 2 replies
  • 793 views

I'm using motion fx library to get orientation of the device. I'm putting the device running sensor-fusion on a cricket bat. If I play a very fast swing, the orientations are becoming inaccurate. if I wait for some time holding bat in standstill position, orientations are coming properly .

gyroscope reaching its full scale value when I swing the bat (2000 dps)

I'm running sensor-fusion at 100 hz

using STM32L476JGY6 mcu

motion fx library version 2.0.0

please help me

Thanks

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    2 replies

    ST Employee
    June 28, 2019

    Hi @kasi viswanadh​ , please consider that if you are working @100Hz and the physical movement you want to detect lasts less than 1/ODR (i.e. 10ms or less), the measure will be intrinsically inaccurate and the motion algorithm could be a little fooled. Please note from motionFX app note you can go faster than 100Hz. Could you try if for higher ODR the accuracy of the measures improves? Regards

    Visitor II
    November 16, 2020

    There are many option to create the motion fx library with the help of your software program. You can see some detail about it.