Measurement of frequency response functions using periodic excitations, corrupted by correlated input/output errors

Author

Pintelon, Rik ; Schoukens, Johan

Author_Institution

Dept. ELEC, Vrije Univ. Brussel, Brussels, Belgium

Volume

50

Issue

6

fYear

2001

fDate

12/1/2001 12:00:00 AM

Firstpage

1753

Lastpage

1760

Abstract

The frequency response function (FRF) of a system is often measured by taking the ratio of the output to the input Fourier coefficients of the steady-state response of the system to a periodic excitation. Generator noise, common noise disturbances picked up by the acquisition channels of the measurement device, and an external feedback loop, cause a correlation between the input/output errors of such an FRF measurement. This paper quantifies the bias error and the variance of the FRF measurement due to correlated input/output errors

Keywords

feedback; frequency response; linear systems; measurement errors; measurement uncertainty; spectral analysers; Fourier coefficients; acquisition channels; bias error; common noise disturbances; correlated input/output errors; external feedback loop; frequency response functions; generator noise; linear systems; periodic excitations; steady-state response; system identification; Arithmetic; Discrete Fourier transforms; Feedback loop; Frequency measurement; Frequency response; Linear systems; Noise generators; Noise measurement; Steady-state; Testing;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.982976

Filename

982976