I sample the BMI088 sensor static data in the marble platform in 0.5 hour, then calc the gyro(x/y/z) PSD, and found the strange peak point on x/y/z as the image below, what is the root cause? btw, BMI088 acc PSD is normal.
more test detail below for reference:
1. BMI088 settings: 23Hz LPF， 200Hz.
2. BMI160 settings and gyro PSD(normal, for reference).
74.6 Hz LPF， 200Hz
Solved! Go to Solution.
Thank you for your help.
For the noise amplitude, I will keep looking into it.
For the spikes in PSD, the data files are attached. To recover PSD at low frequency, I have to log the data for a long time. I attached part of my log files. From these files, you will be able to see spikes at low frequency when 230Hz LPF is chosen.
This PSD issue with big jitter found on x/y axis is confirmed from our engineer team and it is understood.
The root cause is the digitial noise coming from the ADC module insdie our ASIC of sensor.
Thank you for confirmation. This PSD issue doesn't affect much. We can choose 523Hz LPF and apply our own filter.
However, do you have any clue about the noise issue in my previous post? According to the datasheet and FAE_CA1, the noise amplitude should be within +/-3dps. What I get is more than +/-10dps. This will affect the ARW (angle random walk) and cannot be improved by a LPF.