Accuracy and Precision Compared to the MadgwickAHRS about fusion

[xioTechnologies]

The calibration process you have described is unlikely to achieve an accuracy better than 1°. I don't see how your system is capable of evaluating a difference in error of 0.007°. Am I missing something?

[mecitpmk]

The error which I described like "Pitch angle error : 0.001990 Degree" calculated like this ;
Summed all the collected pitch angle and divided to the collected sample amount in .csv file.

I assumed while there is no motion, the mean of the pitch angle should be close to the 0.0000 or sth.

By the way, I applied 6th Order LPF into raw accelerometer data , and 2th Order for the Gyroscope. Thats why, my pitch and roll angle means smaller than 1°.

The value which we get is acceptable of the system requirements but, I just want to trying make the system even better and precise.

Thank you,
Abdulmecid Pamuk

[xioTechnologies]

The difference in error you have reported far exceeds the capabilities of your system. It would be like someone using a voltmeter with 1 mV accuracy, and averaging it to claim they have achieved 7 μV accuracy. I hope you see the problem with that. Either way, I don't think I can be of much more help here.

[mecitpmk]

I see your statement much clear right now. Thank you for the extending our horizon with the clear examples. Before the closing issue Mr.Sebastian, I have one more question;

Is it possible to implement Q1.31 fixed-point format to the your old repos? Do I need extra scaling to prevent overflow (while calculating auxiliary variables and gradient descent algorithm)? I’m totally open your suggestion.

Best Regards,
Abdulmecid Pamuk

[xioTechnologies]

I advise against a fixed-point implementation. It would not be an easy task and it would introduce a significant risk of errors. Furthermore, I doubt the efficiency would improve much beyond the current floating-point implementation, especially given that FPUs are now common in many microcontrollers.

[mecitpmk]

Thank you for everything Mr.Sebastian.

Now I’m closing the thread and again thank you.