Time-frequency analysis of a variable stiffness model for fault development

被引：7

作者：

Cohen, L ^{[1
]}

Galleani, L ^{[1
]}

Hedges, R ^{[1
]}

Hughes, D ^{[1
]}

Loughlin, P ^{[1
]}

Suter, B ^{[1
]}

机构：

[1] USAF, Inst Technol, Dept Elect & Comp Engn, Wright Patterson AFB, OH 45433 USA

来源：

DIGITAL SIGNAL PROCESSING | 2002年 / 12卷 / 2-3期

关键词：

time-frequency analysis; harmonic oscillator; nonlinear oscillator; instantaneous frequency;

D O I：

10.1006/dspr.2002.0458

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：

Over the past 50 years it has been found that many real systems have spectra which are changing in time. In this article we explore the possibility of describing such systems with harmonic and nonlinear oscillator equations whose coefficients are time dependent. We show that time-frequency analysis offers a powerful method to study such systems. (C) 2002 Elsevier Science (USA).

引用

页码：429 / 440

页数：12

共 5 条

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[2]

COHEN L, 1994, P 28 AS C SIGN SYST

[3]

Cohen L., 1995, TIME FREQUENCY ANAL

[4] A method for nonlinear system classification in the time-frequency plane [J].

Galleani, L ;

Lo Presti, L ;

De Stefano, A .

SIGNAL PROCESSING, 1998, 65 (01) :147-153

[5]

Nayfeh A., 1979, NONLINEAR OSCILLATIO

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