How to choose the best filter for White Noise from the Acceleration Az Signal of a MPU6050 connected to Arduino?

4 ビュー (過去 30 日間)
I have to analyze my Az signal to identify road anomalies, from my MPU6050 connected to Arduino Uno. I have a Civil Engineer background so i am noob on Signal Theory and Filters
On Matlab i Implemented two filter:
  1. Savitzky-Golay
  2. Butterworth
I conducted a static test, recording my signal without perturbation on a table. I obtained the following results.
This is the signal after Butterworth with this cutoff value [b,a]=butter(2, 20/25); (i can't understand the intial peaks)
This is the signal after Butterworth if i remove the first peaks
vbuttercleaned=vbutter(100:end,:);
>> t_butter=time_resampledf1(100:end,:);
This is the signal after Savitzky-Golay Smothing filter with this parameters vsgolay = sgolayfilt(vq1,2,27);
  1. How can i choose the best filter for my purpose?
  2. Why I Have that peaks with the Butterworth Filter?
I thought to implement a pilot test and analize false negatives ad false positives. The standard deviation before/after filtering is a significative measure?
I have a civil engineer background, so is my first time with signal analysis, never studied Signal Theory before.

回答 (0 件)

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by