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Resumen

 

AN EVOLUTIONARY ALGORITHM FOR LINEAR SYSTEMS IDENTIFICATION

UN ALGORITMO EVOLUTIVO PARA IDENTIFICACIÓN DE SISTEMAS LINEALES
Ph.D. Edmary Altamiranda.
Ing. Rodrigo Calderón.
Ph.D. Eliezer Colina.

Abstract: Abstract: This paper presents a systems identification method, for discrete time linear systems, based on an evolutionary approach, which allows achieving the selection of a suitable structure and the parameters estimation, using non conventional objective functions. This algorithm incorporates parametric crossover and parametric mutation along a weighted gradient direction (Tang and Wang, 1997). The performance of the proposed method is illustrated with computer simulations using ARX model structures, where parameters, model dynamical order and input-output delay values are estimated.

Resumen: En este trabajo se presenta un algoritmo para identificación lineal de sistemas en tiempo discreto, basado en un enfoque evolutivo, el cual permite llevar a cabo la selección de una estructura apropiada basada en modelos tipo ARX y de la estimación de los parámetros, orden dinámico y retardo entrada/salida del sistema, utilizando funciones objetivos no convencionales. Este algoritmo incorpora operadores de cruce paramétrico y mutación paramétrica utilizando ascenso por gradiente (Tang and Wang, 1997). La eficiencia del algoritmo evolutivo propuesto es ilustrada a través de simulaciones computacionales.

Keywords: Systems identification, Linear systems, Evolutionary algorithms, Parameter Estimation.