NONPARAMETRIC FREQUENCY-RESPONSE FUNCTION ESTIMATORS BASED ON NONLINEAR AVERAGING TECHNIQUES

被引：40

作者：

GUILLAUME, P

PINTELON, R

SCHOUKENS, J

机构：

[1] Vrije Universiteit Brussel, dept. ELEC, Brussels

来源：

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 1992年 / 41卷 / 06期

关键词：

SYSTEM IDENTIFICATION; NONPARAMETRIC TRANSFER FUNCTION ESTIMATORS; SPECTRAL ANALYSIS; CLOSED-LOOP MEASUREMENTS;

D O I：

10.1109/19.199393

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Nonparametric frequency response function (FRF) estimators based on nonlinear averaging techniques are proposed. Under mild assumptions (which are well satisfied after a discrete Fourier transform) it is shown that their bias is proportional to the fourth-order moments of the perturbing errors on the input-output Fourier coefficients, while, for instance, the bias of the classical H-1 estimator is a function of the second-order moments. Analytical expressions are given for the bias when the frequency-domain input-output errors are zero-mean complex Gaussian (and mutually correlated).

引用

页码：739 / 746

页数：8

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