I'm trying to measure the frequency of a blade rotating with an MMA8452Q, and am having a strange issue where it is filtering out my data once the speed reaches 10 RPS (600 RPM). Here is a graph of the data in question:
Sorry it's such a horrendous graph, my graphing tools aren't very good. The x axis is tangential to the centre of rotation and is blue, the y axis is normal to the centre of rotation and is pink, and the z axis is pointing out of the plane of the blades and is yellow.
My primary concern is the patch where the y axis suddenly jumps up to 0.5g and the x axis attenuates. This is when the blades are rotating at >10 RPS. Is there some kind of low-pass filter that could be causing this? I just can't understand why the x axis is attenuating so much.
Thank you for any help you can provide. It might also be worth noting that when the speed is >10 RPS, the acceleration in the y direction is about 50g. I am expecting that to clip, and am happy for it to, I just want to read the x axis data.