Time-frequency characteristics of non-linear systems

被引：29
|
作者：
Braun, S
Feldman, M
机构：
[1] Faculty of Mechanical Engineering, Techion-Israel Inst. of Technology
来源：
MECHANICAL SYSTEMS AND SIGNAL PROCESSING | 1997年 / 11卷 / 04期
关键词：
D O I：
10.1006/mssp.1997.0091
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
The time-varying characteristics of non-linear systems responding to typical identification signals are addressed and the potential for identifying some time-varying patterns is shown. Specifically, the instantaneous frequency of system responses is analysed, and shown to characterise non-linear behaviour. The analysis is done via the Hilbert transform. Examples include a Duffing oscillator and a memoryless system of the type y = x(3). The possibility of enhancing the time-frequency resolution, as compared to classic Fourier methods, is also briefly addressed. (C) 1997 Academic Press Limited.
引用
收藏
页码：611 / 620
页数：10
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