title: Observability of nonlinear dynamics: normalized results and a time-series approach.
abstract: This paper investigates the observability of nonlinear dynamical systems. Two difficulties associated with previous studies are dealt with. First, a normalized degree observability is defined. This permits the comparison of different systems, which was not generally possible before. Second, a time-series approach is proposed based on omnidirectional nonlinear correlation functions to rank a set of time series of a system in terms of their potential use to reconstruct the original dynamics without requiring the knowledge of the system equations. The two approaches proposed in this paper and a former method were applied to five benchmark systems and an overall agreement of over 92% was found.
authors: Programa de Pós-graduação em Engenharia Elétrica, Universidade Federeal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil.
authors: Luis A
authors: LA
authors: Aguirre
authors: Saulo B
authors: SB
authors: Bastos
authors: Marcela A
authors: MA
authors: Alves
authors: Christophe
authors: C
authors: Letellier