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Dissertations / Theses on the topic 'Stabilité Input-To-State'

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1

Kafnemer, Meryem. "Stabilisation des équations des ondes." Electronic Thesis or Diss., Institut polytechnique de Paris, 2022. https://theses.hal.science/tel-04438021.

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Cette thèse traite trois problèmes liés à la stabilisation des équations des ondes. Nous considérons différents cadres fonctionnels et nous utilisons des techniques de démonstration basées sur la méthode des multiplicateurs. Tout d'abord, nous étudions la stabilité de l'équation des ondes avec un amortissement non-linéaire et localisé dans un cadre hilbertien standard en dimension deux. La preuve est basée sur des travaux existants dans le cas d'un amortissement non-localisé. Rajoutons une localisation ainsi que des perturbations. Nous démontrons la stabilité exponentielle le long des solution
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2

Bribiesca, argomedo Fédérico. "Contrôle et stabilité Entrée-Etat en dimension infinie du profil du facteur de sécurité dans un plasma Tokamak Infinite dimensional control and Input-to-State stability of the safety factor profile in a Tokamak plasma." Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00920942.

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Dans cette thèse, on s'intéresse au contrôle du profil de facteur de sécurité dans un plasma tokamak. Cette variable physique est liée à plusieurs phénomènes dans le plasma, en particulier des instabilités magnétohydrodynamiques (MHD). Un profil de facteur de sécurité adéquat est particulièrement important pour avoir des modes d'opération avancés dans le tokamak, avec haut confinement et stabilité MHD. Pour cela faire, on se focalise sur la commande du gradient du profil de flux magnétique poloidal dans le tokamak. L'évolution de cette variable est donnée par une équation de diffusion avec des
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3

Gonzalez, de Cossio Francisco. "Synthèse d’observateur robuste pour les systèmes non linéaires." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSE1273.

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L’estimation d’état d’un système non linéaire est essentielle pour la réussite des objectifs importants tels que : la surveillance, l’identification et le contrôle. Les observateurs sont des algorithmes qui estiment l’état actuel en utilisant, entre autres informations, les mesures effectuées par des capteurs. Le problème de synthèse d’observateur pour les systèmes non linéaires est un sujet de recherche majeur traité depuis plusieurs décennies dans le domaine de la théorie du contrôle. Récemment, les recherches ont également porté sur la synthèse des observateurs pour des modèles de plus en p
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4

Forni, Paolo. "The input-to-state stability framework for multistable systems on manifolds." Thesis, Imperial College London, 2017. http://hdl.handle.net/10044/1/59034.

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As central topics in systems and control theory, the study of stability, robustness, and sensitivity to disturbances for nonlinear systems has gained with the Input-to-State Stability (ISS) paradigm one of its most powerful tools. Standard formulations of ISS and several related notions characterize stability properties in a global setting with respect to a single equilibrium in the origin and for systems defined in Euclidean space. This classical requirements make the basic theory not applicable for a global analysis of many dynamical behaviours of interest for applications, such as: multista
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5

Bertrand, Loïc. "Hot rolling friction control through lubrication." Thesis, Université de Lorraine, 2017. http://www.theses.fr/2017LORR0146.

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Cette thèse porte sur l’amélioration du laminage à chaud, un procédé de fabrication sidérurgique permettant de transformer une brame de métal (10m de long, 1.5m de large et 250mm d’épaisseur) en une bande de tôle bobinée (1000m de long, 1m de large et 2mm d’épaisseur). Afin d’obtenir certaines propriétés mécaniques et de faciliter la phase de laminage, la brame est réchauffée à 1300°C et dégrossi avant d’être envoyé vers le train finisseur où elle est laminée en passant successivement dans plusieurs cages (ensemble de cylindres qui écrasent le métal) et qui permettent de réduire l’épaisseur à
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6

Nabiullin, Robert [Verfasser]. "Input-to-state stability and stabilizability of infinite-dimensional linear systems / Robert Nabiullin." Wuppertal : Universitätsbibliothek Wuppertal, 2018. http://d-nb.info/1169070892/34.

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7

Bill, Adam. "Nonnegative feedback systems in population ecology." Thesis, University of Bath, 2016. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.698987.

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We develop and adapt absolute stability results for nonnegative Lur'e systems, that is, systems made up of linear part and a nonlinear feedback in which the state remains nonnegative for all time. This is done in both continuous and discrete time with an aim of applying these results to population modeling. Further to this, we consider forced nonnegative Lur'e systems, that is, Lur'e systems with an additional disturbance, and provide results on input-to-state stability (ISS), again in both continuous and discrete time. We provide necessary and sufficient conditions for a forced Lur'e system t
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8

Bertrand, Loïc. "Hot rolling friction control through lubrication." Electronic Thesis or Diss., Université de Lorraine, 2017. http://www.theses.fr/2017LORR0146.

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Cette thèse porte sur l’amélioration du laminage à chaud, un procédé de fabrication sidérurgique permettant de transformer une brame de métal (10m de long, 1.5m de large et 250mm d’épaisseur) en une bande de tôle bobinée (1000m de long, 1m de large et 2mm d’épaisseur). Afin d’obtenir certaines propriétés mécaniques et de faciliter la phase de laminage, la brame est réchauffée à 1300°C et dégrossi avant d’être envoyé vers le train finisseur où elle est laminée en passant successivement dans plusieurs cages (ensemble de cylindres qui écrasent le métal) et qui permettent de réduire l’épaisseur à
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9

Mironchenko, Andrii [Verfasser], Sergey [Akademischer Betreuer] Dashkovskiy, and Fabian [Akademischer Betreuer] Wirth. "Input-to-state stability of infinite-dimensional control systems / Andrii Mironchenko. Gutachter: Sergey Dashkovskiy ; Fabian Wirth. Betreuer: Sergey Dashkovskiy." Bremen : Staats- und Universitätsbibliothek Bremen, 2012. http://d-nb.info/1071993623/34.

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10

Carnevale, Guido. "Control-based Design and Analysis of Gradient-Tracking Algorithms for Distributed Quadratic Optimization." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019.

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In this work we design an iterative distributed optimization algorithm, based on the well-known distributed gradient tracking algorithm. We show the advantages of a system theoretical approach on a distributed optimization framework in which the cost function is given by a sum of quadratic functions. In other words, the main idea of the work consists in seeing the update equation characterizing an iterative optimization algorithm as the dynamics equation of a discrete-time system in which the decision variable plays the state variable role. The goal of the work is to show how system and cont
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11

Mannava, Anusha. "Adaptive Control of Nonminimum Phase Aerospace Vehicles- A Case Study on Air-Breathing Hypersonic Vehicle Model." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1503265018577074.

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12

Kennedy, Justin M. "Wave-induced marine craft motion estimation and control." Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/213481/1/Justin_Kennedy_Thesis.pdf.

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Marine craft at sea are affected by environmental disturbances including long-term ocean currents and relatively higher frequency wave disturbances. These disturbances impact on vessels resulting in wave-induced motion which reduces the performance of motion control systems and impacts on the safety of crew and cargo. This thesis investigates parameter estimation techniques for the online estimation of wave-induced motion models and platform control of marine craft in the presence of environmental disturbances.
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13

Liu, Tengfei. "Input-to-state stability methods for nonlinear and network systems." Phd thesis, 2011. http://hdl.handle.net/1885/150296.

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Ubiquitous uncertainties exist in control systems. The concept of input-to-state stability (ISS) is one way to describe how uncertainties influence systems stability. The main purpose of this thesis is to develop some new ISS-based tools to design feedback control laws that are capable of counteracting specific uncertainties in nonlinear and network systems. In Part II, ISS cyclic-small-gain theorems are developed as a basic criterion to analyze the stability and robustness of nonlinear and network systems composed of interacting ISS subsystems. Part III presents a dissipativity-based switchin
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14

Tran, Duc Ngoc Anh. "Advances in stability analysis for nonlinear discrete-time dynamical systems." Thesis, 2019. http://hdl.handle.net/1959.13/1405159.

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Research Doctorate - Doctor of Philosophy (PhD)<br>This thesis investigates stability analysis of discrete-time nonlinear dynamical systems. Stability, which plays a central role in nonlinear control system theory, has been studied extensively resulting in different frameworks such as l<sub>2</sub>-gain stability, Input-to-State stability (ISS), convergent dynamics, and contraction analysis. All of these frameworks were derived differently, were motivated distinctly, and employ different mathematical toolsets. As a consequence, their mutual relationships are, in general, not fully understood.
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15

Vu, Linh Hoang. "Invertibility and input-to-state stability of switched systems and applications in adaptive control /." 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3301242.

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Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2007.<br>Source: Dissertation Abstracts International, Volume: 69-02, Section: B, page: 1230. Adviser: Daniel Liberzon. Includes bibliographical references (leaves 174-179) Available on microfilm from Pro Quest Information and Learning.
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16

Liu, Jun. "Qualitative Studies of Nonlinear Hybrid Systems." Thesis, 2010. http://hdl.handle.net/10012/5658.

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A hybrid system is a dynamical system that exhibits both continuous and discrete dynamic behavior. Hybrid systems arise in a wide variety of important applications in diverse areas, ranging from biology to computer science to air traffic dynamics. The interaction of continuous- and discrete-time dynamics in a hybrid system often leads to very rich dynamical behavior and phenomena that are not encountered in purely continuous- or discrete-time systems. Investigating the dynamical behavior of hybrid systems is of great theoretical and practical importance. The objectives of this thesis are to
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