Title :
Measurement of frequency response functions in noisy environments
Author :
Schoukens, Johan ; Pintelon, Rik
Author_Institution :
Vrije Univ., Brussels, Belgium
fDate :
12/1/1990 12:00:00 AM
Abstract :
The geometric mean is proposed as an alternative averaging technique for frequency response function (FRF) measurements of a linear system. It is shown that it produces almost unbiased measurements even if the input and output measurements are both disturbed with (normal distributed) noise. The properties of the arithmetic and geometric mean of expression are compared to those of the H1 and H2 methods. It is shown that if the S/N ratio on the input and the output measurements is higher than 3 dB, then it is possible to generate measurements without systematic errors
Keywords :
Fourier analysis; measurement errors; measurement theory; random noise; spectral analysis; Fourier transform; S/N ratio; arithmetic mean; frequency response functions; geometric mean; linear system; noisy environments; spectral analysis; systematic errors; Fourier transforms; Frequency domain analysis; Frequency measurement; Frequency response; Hydrogen; Linear systems; Noise measurement; Read only memory; Silicon compounds; Working environment noise;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
