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TIME–FREQUENCY CHARACTERISTICS OF NON-LINEAR SYSTEMS

✍ Scribed by S. Braun; M. Feldman

Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
213 KB
Volume
11
Category
Article
ISSN
0888-3270

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✦ Synopsis

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.

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