Very noisy Roll Pitch Yaw data

[YunHB]

Hello. Thank you for those nice libraries.

I'm trying to use those libraries for MARG sensor fusion, and when I logged those data I got data with huge noise. I am thinking of calibration of sensors and introduction of low-pass filters for sensor data as a solution to the noise.

May I get some hints with your opinion?

I used the c headers and sources.

those pictures are compared shots with commercial IMU module.

[xioTechnologies]

It looks like your Euler angles are garbage, not noisy. I suggest you format your sensor data into a CSV file to be processed by simple_example.py. This will plot gyroscope, accelerometer, and Euler angles side-by-side as shown below. This plot may offer some insight as to what is going on.

[YunHB]

It looks like garbage, but with same imu, same sensors, other algorithm got very accurate euler angle data. And the difference I found between those two algorithm is existence of LPF on sensor data. I will try your suggestion, but I think it won't make this better.

[xioTechnologies]

My suggestion will not make it better because I did not suggest a solution. I suggested that you provide plots that would hopefully allow us to see what the problem is.

[YunHB]

OH that was my misunderstanding, sorry. I applied LPF and HPF on sensor data, and I got a better plot. Maybe the sensors have too much noise or I treated them in unstable condition.

[xioTechnologies]

If you are not going to engage with this support then please close the issue.