Open AccessEffect of noise in controlling strong turbulence by external periodic signal
Author(s) -
Hai-Bo Sang,
He Kaifen
Publication year - 2008
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.57.6830
Subject(s) - laminar flow , physics , turbulence , noise (video) , synchronization (alternating current) , signal (programming language) , phase (matter) , flow (mathematics) , phase synchronization , control theory (sociology) , mechanics , quantum mechanics , channel (broadcasting) , control (management) , computer science , telecommunications , artificial intelligence , image (mathematics) , programming language
Strong turbulence in the driven drift-wave equation of plasma can be suppressed successfully to a laminar flow by an external periodic signal with proper frequency and strength. In the driving wave coordinatesby transforming the wave system to a set of coupled oscillators (modes) moving in a periodic potentialgeneralized phase synchronization between these modes is regarded as one of the control mechanisms. In this paperthe effect of noise is studied in the course of the turbulence control. It is found that the laminar flow becomes disordered again with fairly weak bias noiseat the same time the generalized phase synchronization between the modes is lost. Howeverwhen the bias noise is quite strongthe quasi-period laminar state can be maintained and the modes can also reach generalized phase synchronization with each other.