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République Algérienne Démocratique Et Populaire

Ministère De L’enseignement Supérieur Et De La Recherche Scientifique

Université 20 août 1955- Skikda

Faculté De Technologie

Département génie civil

 

Thèse présentée par Mohammed AIDOUD en vue de l’obtention du diplôme de Doctorat en sciences En Génie Électrique, spécialité AUTOMATIQUE,:

Thème: Robustification de la forme polynomiale de la loi de GPC en utilisant les transferts d’ordre entier

Soutenue publiquement le   **/**/****

Devant le jury composé de :

 Mr. Lamine Mehennaoui MCA            Président         Université du 20 Août 1955, Skikda
Mr. Abderrazek Lachouri Professeur    Rapporteur       Université du 20 Août 1955, Skikda
Mr. Moussa Sedraoui Professeur        Co-encadreur    Université 8 Mai 1945, Guelma
Mr. Abdesselam Babouri Professeur    Examinateur      Université 8 Mai 1945, Guelma
Mr. Kidouche Madjid Professeur         Examinateur      Université M'Hamed Bougara, Boumerdès
Mr. Mohamed Nemissi MCA               Examinateur      Université 8 Mai 1945, Guelma
Mr. Abdelaziz Younsi Professeur        Invité               Université 8 Mai 1945, Guelma

Résumé en arabe, français & anglais:

Abstract:
This work proposes a robustification method of primary two degree-of-freedom (2-DOF)
controllers, which are used to control some uncertain systems such as: hydraulic actuator,
wind turbine equipped with a doubly-fed induction generator DFIG, and so ones. The
proposed robustification method should follow the following three step-procedures. First, the
primary 2-DOF controller is designed through the initial form of the multivariable generalized
predictive control MGPC law to ensure a good tracking dynamic of reference trajectories.
Second, the robust controller is independently designed to ensure good robustness
properties of the closed-loop system against: model uncertainties, neglecting dynamics and
sensor noises. Finally, both above controllers are combined to design the robustified 2-DOFMGPC
controller using the Youla parameterization method. Consequently, the robustified
controller should conserve the same good tracking dynamic that is provided by the primary 2-
DOF-MGPC controller. It should also ensure the same good robustness properties that are
provided by the robust controller. The proposed robustification method is validated from
controlling two previous processes. Their actual behaviors have been modeled by an
unstructured-output multiplicative uncertainty model. The given performances are compared,
in time and frequency domains, with those given through both robust controller and primary
2-DOF one. This comparison confirms the effectiveness of the proposed method in term of
enhancing the trade-off robustness between nominal performances and robust stability of the
closed-loop system.
Key-words: Multivariable Generalized Predictive Control MGPC; Robust control;
Trade-off between nominal performances and robust stability; weighted-mixed sensitivity
problem.

Adresse:

 

Contacts PGP

Adresse:

BP 26 Route d'El-Hadaiek 21000 Skikda - ALGERIE

(Faculté de Technologie- Département de Pétrochimie & Génie des procédés)

E-mails:

fac.techno@univ-skikda.dz

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