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The maximum likelihood ensemble filter performances in chaotic systems Cover

The maximum likelihood ensemble filter performances in chaotic systems

Open Access
|Jan 2009

Abstract

The performance of the maximum likelihood ensemble filter (MLEF), is investigated in the context of generic systems featuring the essential ingredients of unstable dynamics and on a spatially extended system displaying chaos. The main objective is to clarify the response of the filter to different regimes of motion and highlighting features which may help its optimization in more realistic applications. It is found that, in view of the minimization procedure involved in the filter analysis update, the algorithm provides accurate estimates even in the presence of prominent non-linearities. Most importantly, the filter ensemble size can be designed in connection to the properties of the system attractor (Kaplan—Yorke dimension), thus facilitating the filter setup and limiting the computational cost by using an optimal ensemble. As a corollary, this latter finding indicates that the ensemble perturbations in the MLEF reflect the intrinsic system error dynamics rather than a sampling of realizations of an unknown error covariance.

Language: English
Page range: 587 - 600
Submitted on: Jan 9, 2009
Accepted on: Jun 3, 2008
Published on: Jan 1, 2009
Published by: Stockholm University Press
In partnership with: Paradigm Publishing Services

© 2009 Alberto Carrassi, Stephane Vannitsem, Dusanka Zupanski, Milija Zupanski, published by Stockholm University Press
This work is licensed under the Creative Commons Attribution 4.0 License.