Overview:
Joint effort between Rafael Sánchez Garciarivas (Altair Engineering) and Shashikant Sharma (Hutchinson Antivibration Systems).
This OML function can be used in Compose to calculate the half-power bandwidth damping of the peaks of the Frequency Response Function (FRF) of a system, i.e., it measures how far apart the frequencies where a resonant mode reaches half power (1/sqrt(2)) are.
Inputs:
- mag => FRF magnitude [vector]
- f => FRF frequency [vector]
- For peak detection algorithm:
- mph => Minimum peak height [scalar]
- mpd => Minimum peak distance [scalar]
- mpw => Minimum peak width [scalar]
Example:
f = 0:pi/100:10*pi;
mag = sin(f);
[pks fpks Zeta] =halfPowerBandwidthDampingCalc(mag, f, eps, 1, 1)
Sample results (not from example):
pks = [Matrix] 1 x 3
0.00173 0.00086 0.00197
fPks = [Matrix] 1 x 3
4070 9400 10660
Zeta = [Matrix] 1 x 3
0.00737 0.00691 0.00704
Prerequisite:
Having any recent version of Altair Compose (2023 or older).
Usage/Installation Instructions:
Open the .oml file in Compose and execute script. Edit below function definition to analyze your own FRF signal.
Post-Requisite:
None
Release Version:
2024.1
