Title :
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
fDate :
12/1/2001 12:00:00 AM
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;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
