Contents     Functions     Index          PDF

rms

Purpose

Computes the RMS response of the given frequency response function xf or auto-spectra a to a unity white noise input over the frequency range w.

Syntax

rm = rms(t,w)
rm = rms(a,w,1)

Description

The presence of a third input argument indicates that an auto-spectrum a is used (instead of frequency response function xf).

A trapezoidal integration is used to estimate the root mean squared response

If xf is a matrix containing several column FRF, the output is a row with the RMS response for each column.

Warning

If only positive frequencies are used in w, the results are multiplied by 2 to account for negative frequencies.

See also

ii_cost