OBSERVATION OF STOCHASTIC RESONANCE NEAR A SUBCRITICAL BIFURCATION

被引：12

作者：

VOHRA, ST

BUCHOLTZ, F

机构：

[1] Optical Sciences Division, Naval Research Laboratory, Washington, D.C. 20375-5000

来源：

JOURNAL OF STATISTICAL PHYSICS | 1993年 / 70卷 / 1-2期

关键词：

STOCHASTIC RESONANCE; SUBCRITICAL BIFURCATION;

D O I：

10.1007/BF01053977

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A hysteretic subcritical period-doubling bifurcation is observed in the nonlinear strain dynamics of a magnetostrictive oscillator. The dynamic strain response of the magnetostrictive oscillator was observed with a high-resolution fiber optic interferometer. The effects of low-frequency modulation and band-limited stochastic fluctuations on such a bifurcation are investigated. Power spectral density measurements show that for an optimal value of externally injected noise the signal-to-noise ratio of a low-frequency modulation signal is enhanced by greater than 14 dB, thus indicating the first experimental observation of stochastic resonance near a bistable period-doubling bifurcation.

引用

页码：413 / 421

页数：9

共 11 条

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