Recovery of the Time-Evolution Equation of Time-Delay Systems from Time Series

Details Recovery of the Time-Evolution Equation of Time-Delay Systems from Time Series Recovery of the Time-Evolution Equation of Time-Delay Systems from Time Series

1999-06-30

arxiv.org/abs/chao-dyn/9907009v1

Phys. Rev. E 56 (1997) 5083

Nonlinear Sciences

Chaotic Dynamics

Scientific paper

10.1103/PhysRevE.56.5083

We present a method for time series analysis of both, scalar and nonscalar time-delay systems. If the dynamics of the system investigated is governed by a time-delay induced instability, the method allows to determine the delay time. In a second step, the time-delay differential equation can be recovered from the time series. The method is a generalization of our recently proposed method suitable for time series analysis of {\it scalar} time-delay systems. The dynamics is not required to be settled on its attractor, which also makes transient motion accessible to the analysis. If the motion actually takes place on a chaotic attractor, the applicability of the method does not depend on the dimensionality of the chaotic attractor - one main advantage over all time series analysis methods known until now. For demonstration, we analyze time series, which are obtained with the help of the numerical integration of a two-dimensional time-delay differential equation. After having determined the delay time, we recover the nonscalar time-delay differential equation from the time series, in agreement with the 'original' time-delay equation. Finally, possible applications of our analysis method in such different fields as medicine, hydrodynamics, laser physics, and chemistry are discussed.

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