Abstract

The aim of this work is to reconstitute the state of a discrete-time nonlinear system representing a dynamical model of a harvested fish population. For this end, we are going to use a numerical method of building an interval observer for the consider discrete-time model fish population. We adapt to this model an algorithm called "Interval Moving Horizon State Estimation" (IMHSE) which gives an estimated interval of the system states. This algorithm is carried out in [8] and work well for a general class of discrete-time systems. Le but de ce travail est de reconstruire les états d’un système discret non linéaire représentant la dynamique d’une population de poissons soumise à l’action de la pêche. Pour cela nous allons utiliser une méthode numérique de synthèse d’un observateur intervalle du modèle discret de la population de poissons considéré. Nous adaptons à ce modèle un algorithme appelé "Interval Moving Horizon State Estimation" (IMHSE) qui permet d’estimer les états du système par des intervalles. Cet algorithme est développé dans [8] et marche bien pour une classe générale de systèmes discrets.

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