论文标题
延迟对振幅死亡,振荡死亡以及循环耦合振荡器的限制周期行为的影响
Delay Effects on Amplitude Death, Oscillation Death, and Renewed Limit Cycle Behavior in Cyclically Coupled Oscillators
论文作者
论文摘要
考虑了分布式的“弱通用核”延迟对周期耦合极限周期和混乱振荡器的影响。对于耦合的范德振荡器(实际上,其他振荡器),延迟可以产生从振幅死亡(AD)或振荡死亡(OD)到HOPF分叉引起的周期性行为的过渡,并且延迟限制周期缩小或随着延迟的延迟缩小或从Bifurcurcation差异而变化。从AD到OD的过渡是通过干草叉分叉介导的,如先前的其他耦合所示。同样,在此处,周期性耦合的未估算的范德尔系统已经处于AD/OD状态,并且随着延迟参数的变化,引入延迟允许延迟和AD/OD。这与其他极限周期系统相反,在其他极限周期系统中,仅扩散耦合并不能导致AD/OD的发作。对于各个振荡器是混乱的系统,例如Sprott振荡器系统或具有参数强迫的耦合的Van der pol-rayleigh系统,延迟可能会产生AD/OD(如在Sprott案例中),而AD到OD转变现在通过转批临界分化发生。但是,这可能是不可能的,延迟可能只会改变吸引子形状。但是,在这种情况下,这两种情况下,延迟强度的提高趋于使系统具有更简单的行为,简化吸引子的形状或在振荡的情况下缩小它。
The effects of a distributed 'weak generic kernel' delay on cyclically coupled limit cycle and chaotic oscillators are considered. For coupled Van der Pol oscillators (and in fact, other oscillators as well) the delay can produce transitions from amplitude death(AD) or oscillation death (OD) to Hopf bifurcation-induced periodic behavior, with the delayed limit cycle shrinking or growing as the delay is varied towards or away from the bifurcation point respectively. The transition from AD to OD is mediated here via a pitchfork bifurcation, as seen earlier for other couplings as well. Also, the cyclically coupled undelayed van der Pol system here is already in a state of AD/OD, and introducing the delay allows both oscillations and AD/OD as the delay parameter is varied. This is in contrast to other limit cycle systems, where diffusive coupling alone does not result in the onset of AD/OD. For systems where the individual oscillators are chaotic, such as a Sprott oscillator system or a coupled van der Pol-Rayleigh system with parametric forcing, the delay may produce AD/OD (as in the Sprott case), with the AD to OD transition now occurring via a transcritical bifurcation instead. However, this may not be possible, and the delay might just vary the attractor shape. In either of these situations however, increased delay strength tends to cause the system to have simpler behavior, streamlining the shape of the attractor, or shrinking it in cases with oscillations.