Complementary Filters

[enrcjone]

I have an MPU9250.  I am attempting to calculate angular position in both roll and pitch planes, using the accel and gyro.  I have used the complementary filter used by an NI demonstration on youtube.  When a single filter is implemented, ie just on roll, this works perfectly.  I am putting raw and filtered data into a waveform chart.  However when I try to process both roll and pitch (on separate waveform charts, separate filter sub vi), both become wrong all of a sudden.  Has anyone experienced this before.  Is it down to the performance of my laptop (which is poor), or am I missing something fundamental here?

Thanks,

Chris

[jinfone.t]

Hi enrcjone,

Would it be possible for you to upload your code onto the thread? 

What NI demonstration have you been watching?

[enrcjone]

This is the video I was following:  https://www.youtube.com/watch?v=vtIiqnTJoHg

And i have attached the project as a zip

Thanks,

Chris

[Alan_K.]

Hi.  I am aware that this now a very old thread, but the topic and content are still relevant and of interest.

In the Youtube video which Lewis Gear posted back in 2012, was a link to the underlying LabVIEW code, but this link is now broken.

Is anyone able to provide me with a copy of the Complementary Filter software?  I would be very grateful.

Thanks - Alan K.