Section: New Results

Other application domains

Participants : Fabien Campillo, Céline Casenave.

Semi-Markov land use dynamic

With IRD (GRED Montpellier) and the Univ. of Fianarantsoa (Madagascar) we pursued our study on land use dynamics models corresponding to parcels located on the edge of the forest corridor, Madagascar. We use semi-Markov chain to infer the land-use dynamics. In addition to the empirical and maximum likelihood methods, we estimate the semi-Markov kernel by a Bayesian approach [21] .

Ice cream crystallization

We study the problem of the control of an ice cream crystallization process, part of the European CAFE project, in collaboration with CESAME (Univ. Catholique de Louvain-la-neuve), Irstea Antony and AgroParisTech. The goal is to control the viscosity of the ice cream at the outlet of the continuous crystallizer. On the basis of a population balance equation describing the evolution of the crystal size distribution of the ice cream, and an energy balance equation, we have proposed an input-output reduced order model of the process, that has been identified and validated on experimental data [23] . A nonlinear control strategy based on an adaptive linearizing control law coupled with a Smith predictor to account for the measurement delay has been proposed, and validated on the experimental pilot plant (paper in preparation).