THD selects wrong peak as input fundamental

2 visualizzazioni (ultimi 30 giorni)
Aditya TB
Aditya TB il 26 Feb 2019
I am measuring a voice coil for distortion. I drive the coil with a sine signal at say 200 Hz, and record the vibration of the voice coil as a digital signal in MATLAB by using an accelerometer. I then use the thd function to represent the distortion at that fundamental frequency.
Now it seems like when I look at the PSD, I observe some peaks are higher than the 200 Hz that I have input, and the thd function assumes that this higher peak is the fundamental, and calculates thd in relation to that.
Is there a way to ensure that the thd algorithm picks the given 200 Hz as the fundamental frequency?

Accedi per rispondere a questa domanda.

Risposte (0)

Categorie

Scopri di più su Spectral Measurements in Help Center e File Exchange

Tag

Community Treasure Hunt

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

Start Hunting!

Translated by