1. Rien de plus utile qu'une bonne théorie : la commande sans modèle
- Author
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Fliess, Michel, Join, Cédric, Riachy, Samer, Laboratoire d'informatique de l'École polytechnique [Palaiseau] (LIX), École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Centre de Recherche en Automatique de Nancy (CRAN), Université Henri Poincaré - Nancy 1 (UHP)-Institut National Polytechnique de Lorraine (INPL)-Centre National de la Recherche Scientifique (CNRS), Non-Asymptotic estimation for online systems (NON-A), Inria Lille - Nord Europe, Institut National de Recherche en Informatique et en Automatique (Inria)-Institut National de Recherche en Informatique et en Automatique (Inria)-Centre de Recherche en Informatique, Signal et Automatique de Lille - UMR 9189 (CRIStAL), Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS)-Centrale Lille-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Électronique et Commande des Systèmes Laboratoire (ECS-Lab), Ecole Nationale Supérieure de l'Electronique et de ses Applications, and Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X)
- Subjects
intelligent controllers ,delays ,[INFO.INFO-AU]Computer Science [cs]/Automatic Control Engineering ,PID ,partial differential equations ,identification ,sliding modes ,[MATH.MATH-OC]Mathematics [math]/Optimization and Control [math.OC] ,model-free control ,heat exchanger ,inverted pendulum ,[SPI.AUTO]Engineering Sciences [physics]/Automatic - Abstract
International audience; The experience gained with numerous successful applications permits to revisit some points of model-free control. The numerical differentiation of noisy signals may be replaced by a real time parameter identification which is much simpler. The strange ubiquity of classic PIDs is explained as well as the almost universal utilization of ultra-local models of order 1. We show that even with a partially known model the utilization of an intelligent PI controller remains profitable. Two examples, an inverted pendulum and a heat exchanger, seem to confirm the superiority of model-free control with respect to sliding modes control and techniques stemming from infinite-dimensional systems, such as delays or partial differential equations. Our paper is illustrated by several computer simulations.
- Published
- 2011