Publications by Grégory François

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In this paper, the problem of predicting blood glucose concentrations (BG) for the treatment of patients with type 1 diabetes, is addressed. Predicting BG is of very high importance as most treatments, which consist in exogenous insulin injections, rely on ...

We investigate the general iterative controller tuning (ICT) problem, where the task is to find a set of controller parameters that optimize some user-defined performance metric when the same control task is to be carried out repeatedly. Following a repeat ...

The experimental validation of a real-time optimization (RTO) strategy for the optimal operation of a solid oxide fuel cell (SOFC) stack is reported in this paper. Unlike many existing studies, the RTO approach presented here utilizes the constraint-adapta ...

For patients with type 1 diabetes mellitus, appropriate control of blood glucose concentrations is vital. Exercise is one of the disturbances that can affect these concentrations. Therefore, predictions in the presence of exercise are useful among others f ...

The present article looks at the problem of iterative controller tuning, where the parameters of a given controller are adapted in an iterative manner to bring the user-defined performance metric to a local minimum for some repetitive process. Specifically ...

A new approach for gradient estimation in the context of real-time optimization under uncertainty is proposed in this paper. While this estimation problem is often a difficult one, it is shown that it can be simplified significantly if an assumption on the ...

This paper applies a novel two-layer optimizing control scheme to a kite-control benchmark problem. The upper layer is a recent real-time optimization algorithm, called Directional Modifier Adaptation, which represents a variation of the popular Modifier A ...

This paper analyzes the maximum power that a kite, or system of kites, can extract from the wind. Firstly, a number of existing results on kite system efficiency are reviewed. The results that are generally applicable require significant simplifying assump ...

Model-based optimization is an increasingly popular way of determining the values of the degrees of freedom in a process. The difficulty is that the available model is often inaccurate. Iterative set-point optimization, also known as modifier adaptation, o ...

This paper’s main contribution is a theoretical result that can be used to evaluate the maximum powergenerating potential of any kite-power system. An upper bound is derived for the power a wing can generate in a given wind speed. It is proven that the ang ...

La consommation des ressources energetiques est actuellement un enjeu primordial, notamment dans le secteur du batiment, qui represente à lui seul 42 % de l’energie consommee en France. La mixite energetique, renouvelable et fossile, ainsi qu’une meilleure ...

This document acts as a detailed users' guide to the SCFO real-time optimization (RTO) solver, and guides the user through basic setup, configuration, and theoretical aspects of the solver. Several application examples are also presented.

Various real-time optimization techniques proceed by controlling the gradient to zero. These methods primarily differ in the way the gradient is estimated. This paper compares various gradient estimation methods. It is argued that methods with model-based ...

Measurements can be used in an optimization framework to compensate the effects of uncertainty in the form of model mismatch or process disturbances. Among the various options for input adaption, a promising approach consists of directly enforcing the nece ...

Grégory François

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A Therapy Parameter-based Model for Predicting Blood Glucose Concentrations in Patients with Type 1 Diabetes

A Real-Time Optimization Framework for the Iterative Controller Tuning Problem

A Globally Convergent Run-to-run Control Algorithm with Improved Rate of Convergence

Experimental Real-Time Optimization of a Solid Oxide Fuel Cell Stack via Constraint Adaptation

A Minimal Exercise Extension for Models of the Glucoregulatory System

Iterative Controller Tuning by Real-Time Optimization

Exploiting Local Quasiconvexity for Gradient Estimation in Modifier-Adaptation Schemes

Directional Real-Time Optimization Applied to a Kite-Control Simulation Benchmark

Analysis of the Maximum Efficiency of Kite-Power Systems

Real-Time Optimization when the Plant and the Model have Different Inputs

A Betz-Inspired Principle for Kite-Power Generation Using Tethered Wings

Strategies de controle pour la gestion energetique d'un batiment

The SCFO Real-Time Optimization Solver: Users' Guide (version 0.9.4)

Comparison of Gradient Estimation Methods for Real-time Optimization

Use of Measurements for Enforcing the Necessary Conditions of Optimality in the Presence of Constraints and Uncertainty

Optimisation temps reel en présence d'incertitude et de contraintes

Run-to-Run Optimization of Batch Styrene Copolymerization

Table ronde formation I. Formations francophones en Génie des Procédés : Etat des lieux et synergies d'amelioration

Real-Time Optimization of Chemical Processes

Run-to-run Optimization of Batch Emulsion Polymerization