I have an nrf51822 board with a 9 axis imu sensor, from which I must determine the pitch, yaw, and roll of the board.

[satish]

hi everyone i'm using 9 axis imu sensor with the nrf51822 board and i'm confusing in how to calculate the roll,pitch and yaw values,can you please suggest me some methods....

thanks...

[bjorn-spockeli]

Hi Satish,

I would recommend taking a look at Madgewick's IMU and AHRS algorithms and Robert Mahoney's DCM(Direct Cosine Matrix) Filter. You can find a a report and a published paper(both by Magdewick) describing the algorithms and the C code (Header and source files) implementation for both algorithms on this website.

Best regards

Bjørn

[satish]

Thank you Bjørn for your replay. i have gone through the Madgwick’s implementations and bit confused because i'm beginner for all of those and i want more comfortable and simple methods. could you provide me some more please..

thanks, Satish.

[bjorn-spockeli]

Ok, if you want a simpler approach, then I suggest that you take a look here and here.