Improved Variance Estimates of FRF Measurements in the Presence of Nonlinear Distortions Via Overlap

被引：4

作者：

Barbe, Kurt ^{[1
]}

Pintelon, Rik ^{[1
]}

Schoukens, Johan ^{[1
]}

Lauwers, Lieve ^{[1
]}

机构：

[1] Vrije Univ Brussel, Elect Measurement Dept ELEC, B-1050 Brussels, Belgium

来源：

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 2011年 / 60卷 / 01期

关键词：

Frequency domain; frequency response function (FRF); measurement noise; nonlinear distortions; Volterra systems; LINEAR-SYSTEMS; IDENTIFICATION;

D O I：

10.1109/TIM.2010.2049218

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：

The frequency response function (FRF) is a common nonparametric modeling tool in many practical engineering problems used for obtaining insight in the device under test. However, the device often behaves nonlinearly. When nonlinearities are detected, the user wants to find out how large these are with respect to the measurement noise. In this paper, we describe a method, based on an overlap technique and periodic excitations, that accurately estimates the FRF, the level of nonlinear distortion, and the measurement noise using only two periods and two random phase realizations of the input signal.

引用

页码：300 / 309

页数：10

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