Bibliografie tematiche / Robust LPV Control

Letteratura scientifica selezionata sul tema "Robust LPV Control"

Autore: Grafiati

Pubblicato: 1 giugno 2024

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Articoli di riviste sul tema "Robust LPV Control":

Eichler, Annika, Christian Hoffmann e Herbert Werner. "Robust control of decomposable LPV systems". Automatica 50, n. 12 (dicembre 2014): 3239–45. http://dx.doi.org/10.1016/j.automatica.2014.10.046.

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Shen, Bin, Lingfei Xiao e Zhifeng Ye. "A Full Envelope Robust Linear Parameter-Varying Control Method for Aircraft Engines". Aerospace 10, n. 9 (31 agosto 2023): 769. http://dx.doi.org/10.3390/aerospace10090769.

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In order to solve the problem of full flight envelope control for aircraft engines, the design of a linear parameter-varying (LPV) controller is described in this paper. First, according to the nonlinear aerodynamic model of the aircraft engine, the LPV engine model for the controller design is obtained through the Jacobian linearization and fitting technique. Then, the flight envelope is divided into several sub-regions, and the intersection of adjacent sub-regions is not empty. The sub-region LPV controller is designed using the parameter-dependent Lyapunov function (PDLF)-based LPV synthesis method, while eliminating the dependence of the LPV controller on scheduling parameter derivatives. In order to ensure the stability and performance of the aircraft engine across the full flight envelope, a mixing LPV control method is proposed to design the LPV controller in the overall region. The effectiveness of the proposed method is verified by simulating a dual-spool turbofan engine on a nonlinear component level model and comparing the proposed method with the gain scheduling based on PI and H∞ point design.

Ma, Song Hui, Peng Yuan Shao e Cheng Fu Wu. "LPV Based Robust Gain – Scheduling Control for Transient Mode of Morphing UAV". Advanced Materials Research 622-623 (dicembre 2012): 1368–72. http://dx.doi.org/10.4028/www.scientific.net/amr.622-623.1368.

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Robust Gain-Scheduling control based on Linear Parameter-Varying (LPV) system is researched in theory and applied to transient mode control of a morphing wing UAV (MUAV). H∞ output feedback control method is extended to the LPV system via parameterized LMIs. In application, LPV model of MUAV is established using the Jacobian linearization method, based on which an LPV controller is designed using the proposed method to control the attitudes of transient mode in morphing process, the problem of high frequency dynamics is found and solved by a robust pole constraint method. Monte-Carlo simulation is performed for 30 times, by which satisfactory performance and robustness of the LPV controller is revealed.

Hasseni, Seif-El-Islam, e Latifa Abdou. "Robust LPV Control for Attitude Stabilization of a Quadrotor Helicopter under Input Saturations". Advances in Technology Innovation 5, n. 2 (1 aprile 2020): 98–111. http://dx.doi.org/10.46604/aiti.2020.3953.

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This article investigates the robust stabilization of the rotational subsystem of a quadrotor against external inputs (disturbances, noises, and parametric uncertainties) by the LFT-based LPV technique. By establishing the LPV attitude model, the LPV robust controller is designed for the system. The weighting functions are computed by Cuckoo Search, a meta-heuristic optimization algorithm. Besides, the input saturations are also taken into account through the Anti-Windup compensation technique. Simulation results show the robustness of the closed-loop system against disturbances, measurement noises, and the parametric uncertainties.

Szabó, Z., Zs Biró e J. Bokor. "All controllers for an LPV robust control problem". IFAC Proceedings Volumes 45, n. 13 (2012): 343–48. http://dx.doi.org/10.3182/20120620-3-dk-2025.00058.

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Zhou, Guang Rui, Shi Qian Liu, Yuan Jun Sang, Xu Dong Wang, Xiao Peng Jia e Er Zhuo Niu. "LPV robust servo control of aircraft active side-sticks". Aircraft Engineering and Aerospace Technology 92, n. 4 (31 marzo 2020): 599–609. http://dx.doi.org/10.1108/aeat-08-2019-0155.

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Purpose This paper aims to focus on the variable stick force-displacement (SFD) gradience in the active side stick (ASS) servo system for the civil aircraft. Design/methodology/approach The problem of variable SFD gradience was introduced first, followed by the analysis of its impact on the ASS servo system. To solve this problem, a linear-parameter-varying (LPV) control approach was suggested to process the variable gradience of the SFD. A H∞ robust control method was proposed to deal with the external disturbance. Findings To validate the algorithm performance, a linear time-variant system was calculated to be used to worst cases and the SFD gradience was set to linear and non-linear variation to test the algorithm, and some typical examples of pitch angle and side-slip angle tracking control for a large civil aircraft were also used to verify the algorithm. The results showed that the LPV control method had less settling time and less steady tracking errors than H∞ control, even in the variable SFD case. Practical implications This paper presented an ASS servo system using the LPV control method to solve the problem caused by the variable SFD gradience. The motor torque command was calculated by pressure and position feedback without additional hardware support. It was more useful for the electronic hydraulic servo actuator. Originality/value This was the research paper that analyzed the impact of the variable SFD gradience in the ASS servo system and presented an LPV control method to solve it. It was applicable for the SFD gradience changing in the linear and non-linear cases.

Chen, Jianchi, Dawei Gu, Ian Postlethwaite e Kannan Natesan. "Robust LPV Control of UAV with Parameter Dependent Performance". IFAC Proceedings Volumes 41, n. 2 (2008): 15070–75. http://dx.doi.org/10.3182/20080706-5-kr-1001.02550.

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Xie, W. "Robust control system design for polytopic stable LPV systems". IMA Journal of Mathematical Control and Information 20, n. 2 (1 giugno 2003): 201–16. http://dx.doi.org/10.1093/imamci/20.2.201.

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Maalej, Sonia, Alexandre Kruszewski e Lotfi Belkoura. "Robust Control for Continuous LPV System with Restricted-Model-Based Control". Circuits, Systems, and Signal Processing 36, n. 6 (20 settembre 2016): 2499–520. http://dx.doi.org/10.1007/s00034-016-0404-6.

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Cao, Guoyan, Karolos M. Grigoriadis e Yaw D. Nyanteh. "LPV Control for the Full Region Operation of a Wind Turbine Integrated with Synchronous Generator". Scientific World Journal 2015 (2015): 1–15. http://dx.doi.org/10.1155/2015/638120.

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Wind turbine conversion systems require feedback control to achieve reliable wind turbine operation and stable current supply. A robust linear parameter varying (LPV) controller is proposed to reduce the structural loads and improve the power extraction of a horizontal axis wind turbine operating in both the partial load and the full load regions. The LPV model is derived from the wind turbine state space models extracted by FAST (fatigue, aerodynamics, structural, and turbulence) code linearization at different operating points. In order to assure a smooth transition between the two regions, appropriate frequency-dependent varying scaling parametric weighting functions are designed in the LPV control structure. The solution of a set of linear matrix inequalities (LMIs) leads to the LPV controller. A synchronous generator model is connected with the closed LPV control loop for examining the electrical subsystem performance obtained by an inner speed control loop. Simulation results of a 1.5 MW horizontal axis wind turbine model on the FAST platform illustrates the benefit of the LPV control and demonstrates the advantages of this proposed LPV controller, when compared with a traditional gain scheduling PI control and prior LPV control configurations. Enhanced structural load mitigation, improved power extraction, and good current performance were obtained from the proposed LPV control.

Più fonti

Tesi sul tema "Robust LPV Control":

Abouselima, Eslam. "Fault tolerant control and path planning for quasi-LPV systems : application to quadrotor". Electronic Thesis or Diss., université Paris-Saclay, 2022. http://www.theses.fr/2022UPAST085.

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Récemment, les systèmes autonomes deviennent de plus en plus populaires et sont largement déployés dans plusieurs applications de notre vie quotidienne. C'est pourquoi une grande préoccupation a été consacrée au problème du contrôle tolérant aux fautes (FTC) des systèmes autonomes. De toute évidence, les drones sont parmi les systèmes qui ont besoin de tels algorithmes de FTC, car tout dysfonctionnement du système peut causer de graves dommages non seulement pour le véhicule lui-même, mais aussi pour l'environnement. Ce travail étudie donc le problème de la conception d'un algorithme FTC pour un quadrotor afin de contribuer à l'évolution de la sécurité et de la fiabilité des drones. Un tel problème est abordé à travers quelques étapes fondamentales, en commençant par l'établissement d'un modèle fiable pour le système représentant la dynamique physique avec précision. Ainsi, la formulation de Newton-Euler est utilisée pour modéliser le quadrotor, ce qui donne un modèle mathématique qui décrit la relation entre les forces appliquées et les états du système. Ensuite, le modèle non linéaire est linéarisé autour du point de vol stationnaire pour simplifier la conception de la loi de contrôle. Un modèle précis pourrait être construit dans un cadre LPV où les termes non linéaires sont considérés comme variant linéairement dans le temps dans les limites des paramètres donnés. Le modèle déduit est ensuite utilisé pour construire un contrôleur qui stabilise le quadrotor et garantit un suivi de trajectoire adéquat. Ainsi, différents types de lois de contrôle sont présentés et analysés, certains d'entre eux sont des contrôleurs linéaires comme le PID avec une technique de mise en forme de la boucle. D'autres types de contrôleurs présentés sont LQG pour gérer le système dont les mesures sont affectées par un bruit blanc gaussien et un contrôle LPV robuste basé sur la technique H_inf pour surmonter les perturbations exogènes inconnues et le bruit de mesure. Afin de fournir au quadrotor un schéma FTC efficace, une unité de détection et de diagnostic des défauts (FDD) est proposée pour identifier le type, la quantité et l'emplacement du défaut existant qui contient un observateur basé sur le modèle du systéme. Ainsi, un observateur est conçu sur la base de la technique H_/H_inf visant à maximiser la sensibilité des défauts aux signaux résiduels en utilisant les propriétés de l'indice H_, et à minimiser la norme H_inf pour l'atténuation des signaux exogènes dans le pire des cas. Ensuite, une nouvelle approche est proposée pour la conception de l'observateur basée sur une sortie auxiliaire contenant la sortie du système et ses dérivées temporelles successives. Cette approche est utilisée pour le diagnostic des défauts des actionneurs et des capteurs, y compris la détection, l'estimation et l'isolation des défauts. Il est illustré que dans certaines conditions structurelles, les défauts peuvent être estimés exactement alors que les perturbations sont complètement découplées des signaux résiduels. Cependant, si la convergence exacte n'est pas assurée, certaines conditions relaxantes sont fournies pour maintenir une estimation asymptotique des défauts. Enfin, le pire cas où les perturbations ne peuvent être découplées est présenté et traité à l'aide de l'approche H_/H_inf qui est encore améliorée en utilisant la sortie auxiliaire. Sur la base des résultats obtenus par l'unité FDD de l'actionneur, une loi de commande active tolérante aux défauts est conçue. Après l'évaluation du défaut, le FDD donne une décision pour l'unité de reconfiguration du contrôleur si le dommage de l'actionneur peut être contenu ou non. Dans le premier cas, une loi de commande est proposée afin de compenser les défauts et de suivre une trajectoire précise en présence d'un dysfonctionnement du système. Pour le second cas, un mode de sécurité est utilisé pour s'assurer que le quadrotor peut atterrir en toute sécurité sans s'écraser ou causer des dommages à l'environnement
Recently, autonomous systems are getting increasingly popular and are widely deployed in several applications in our daily life. That's why a great concern has been dedicated to the problem of autonomous systems fault-tolerant control (FTC). Evidently, the UAVs are among the systems that are in need of such FTC algorithms because any system malfunction can cause severe damage not just for the vehicle itself but for the surrounding environment as well. So this work is investigating the problem of designing an FTC algorithm for a quadrotor aiming to be a worthy contribution to the evolution of UAVs safety and reliability. Such a problem is tackled through some fundamental steps beginning with establishing a trustful model for the system representing the physical dynamics accurately. So Newton-Euler formulation is used for modeling the quadrotor resulting in a mathematical model that describes the relationship between the applied forces and the system states. After that the nonlinear model is linearized around the hovering point to simplify the control law design. A precise model could be constructed in an LPV framework where the nonlinear terms are considered as linearly time-varying within the given parameter limits. The deduced model is then used to build a controller that stabilizes the quadrotor and guarantees adequate trajectory tracking. So different types of control law are presented and analyzed some of them are linear controllers like PID provided with loop shaping technique. Other types of controllers presented are LQG to handle the system whose measurements are affected by Gaussian white noise and robust LPV control based on the H_inf technique to overcome unknown exogenous disturbances and measurement noise. In order to provide the quadrotor with an efficient FTC scheme, first, a fault detection and diagnosis (FDD) unit is proposed to identify the type, amount, and location of the existent fault. The FDD unit contains a model-based observer that generates some residual signals indicating the fault occurrence. According to the observer design, it may give just fault detection with a bank of observers for fault isolation or it can perform fault detection, estimation, and identification simultaneously. So an observer is designed based on H_/ H_inf technique aiming at maximizing the fault to residual sensitivity by using the H_ index properties, and minimizing the H_inf norm for worst-case exogenous signals attenuation. Afterward, a new approach is proposed for observer design based on an auxiliary output containing the system output and its successive time derivatives. This approach is used for both actuators and sensors fault diagnosis including fault detection, estimation, and isolation. It is illustrated that under some structural conditions, the faults can be estimated exactly while the perturbations are completely decoupled from the residual signals. However, if exact convergence is not ensured, some relaxed conditions are provided to maintain asymptotic fault estimation. Finally, the worst-case where the perturbations cannot be decoupled is presented and handled using H_/H_inf approach which is further enhanced utilizing the auxiliary output. Upon the obtained results from the actuator FDD unit, an active fault-tolerant control law is designed. After fault evaluation, the FDD gives a decision for the controller reconfiguration unit whether the actuator damage can be contained or not. For the first case, a control law is proposed aiming at fault compensation and precise trajectory tracking in the presence of system malfunction. For the latter case, a fail-safe mode is used to ensure that the quadrotor can land safely without crashing or causing harm to the surrounding environment

Sereni, Bruno. "Static output feedback control for LPV and uncertain LTI systems /". Ilha Solteira, 2019. http://hdl.handle.net/11449/180732.

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Orientador: Edvaldo Assunção
Resumo: Este trabalho aborda o controle via realimentação estática de saída aplicado à sistemas lineares com parâmetro variante (LPV) e lineares incertos invariantes no tempo (LIT). O projeto de ganhos de realimentação estática de saída apresentado neste trabalho é baseado no método dos dois estágios, o qual consiste em primeiramente obter um ganho de realimentação de estados, e então, utilizar esta informação no segundo estágio para obter-se o ganho de realimentação estática de saída desejado. As soluções para os problemas investigados são apresentadas na forma de desigualdades matriciais lineares (no inglês, linear matrix inequalities, LMIs), obtidas por meio da aplicação do Lema de Finsler. Baseado em resultados anteriores encontrados na literatura, este trabalho propõe uma estratégia de relaxação de forma a obter um método menos conservador para obtenção de ganhos robustos de realimentação estática de saída para sistemas incertos LTI. Na estratégia proposta, as variáveis adicionais do Lema de Finsler são consideradas como dependentes de parâmetro, juntamente com o uso de funções de Lyapunov dependentes de parâmetro (no inglês, parameter-dependent Lyapunov functions, PDLFs). É apresentado um estudo avaliando a eficácia da estratégia proposta em fornecer uma maior região de factibilidade para um dado problema. Os resultados foram utilizados em uma comparação com um método de relaxação baseado apenas no uso de PDLFs. Uma segunda contribuição deste trabalho consiste na proposta de um... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The static output feedback (SOF) control applied to linear parameter-varying (LPV) and uncertain linear time-invariant (LTI) systems are addressed in this work. The approach chosen for the design of SOF gains is based on the two-stage method, which consists in obtaining a state feedback gain at first, and then using that information for deriving the desired SOF gain at the second stage. The solutions for the investigated problems are presented in terms of linear matrix inequalities (LMIs), obtained by means of the application of the Finsler's Lemma. Based on previous papers found in literature, this work proposes a relaxation strategy in order to achieve a less conservative method for obtaining robust SOF gains for uncertain LTI systems. In the proposed strategy, the Finsler's Lemma additional variables are considered to be parameter-dependent along with the use of parameter-dependent Lyapunov functions (PDLFs). A study evaluating the effectiveness of the proposed strategy in providing a larger feasibility region for a given problem is presented. The results were used in a comparison with a relaxation method based only on PDLFs. Another contribution of this work lies in the proposal of a solution for the control of LPV systems via the design of a gain-scheduled SOF controller. The methods proposed for both control problems were applied on the design of controllers for an active suspension system. In the experiments, it was assumed that only one of its four system's states wer... (Complete abstract click electronic access below)
Mestre

Pita, Guillermo. "Application de techniques de commande avancées dans le domaine automobile". Thesis, Supélec, 2011. http://www.theses.fr/2011SUPL0002/document.

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Les travaux effectués lors de cette thèse se sont focalisés sur les applications des méthodes et techniques d’Automatique avancée à des problématiques actuelles de l’automobile. Les sujets abordés ont porté sur trois axes fondamentaux en s’appuyant sur des techniques telles que la synthèse H infini LTI et q-LPV, la linéarisation par bouclage dynamique, la retouche de correcteurs de type PI en particulier et l’optimisation des pondérations des filtres nécessaires aux synthèses H infini :• Contrôle de la trajectoire d’un véhicule automobile. Nous avons proposé une structure de commande reprenant une démarche classiquement mise en œuvre dans le milieu aéronautique ou spatial.• Contrôle de la chaîne d’air d’un moteur essence, turbocompressé. Nous avons proposé une formulation novatrice de type q-LPV du modèle du moteur. Cette formulation d’un nouveau modèle de commande nous a permis de synthétiser des correcteurs évolués à paramètres variables qui s’adaptent automatiquement au point de fonctionnement.• Contrôle du freinage d’un véhicule électrique. Pour cette partie, nous avons précisé la motivation et l’intérêt des véhicules électriques, puis étudié le gain d’autonomie potentiellement accessible par la mise en œuvre d’une récupération d’énergie au freinage. Finalement, des solutions permettant de réduire les oscillations induites dans la chaîne de traction par des demandes de couple freineur à la machine électrique ont été développées
The work achieved in this PhD thesis is dedicated to applications of advanced control methodologies to problems currently faced in the automotive field. Three main areas of investigation were successively considered, using advanced techniques such as H infinity LTI and q-LPV design procedures, dynamic feedback linearization, retuning of controllers, in particular PI-type, and optimization of filters required by the H infinity design procedure:• Trajectory control of automotive vehicle. A control structure has been proposed which is based on the procedure classically developed in the aeronautics field.• Robust nonlinear control of the air path of an internal combustion engine. An innovative q-LPV formulation of the motor has been proposed, which has enabled design of advanced controllers with varying parameters. These parameters are automatically updated according to the operating point.• Optimal control laws for brakes’s torque blending on electrical vehicle. Motivation and interest for electrical vehicle has been first detailed, then potential gain in autonomy due to regenerative braking has been studied. Finally, solutions which reduce oscillations in the power train chain induced by torque demand to the electrical machine during braking phases has been developed

Fergani, Soheib. "Commande robuste LPV/H infini multivariable pour la dynamique véhicule". Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENT053/document.

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L'objectif principale de cette thèse est de développer contrôleurs innovants MIMO pour la dynamique véhicule tout en préservant la stabilité du véhicule dans les situations de conduite critiques. Des stratégies de commandes innovatrices ont été introduites pour résoudre cette problématiques. En effet, ces travaux se base sur travaux l'utilisation de la commande LPV/Hinf pour contrôler simultanément les actionneurs de freinage, braquage et de suspensions pour réaliser les objectives du contrôle.Aussi de stratégies d'estimation du profil de route très intéressant et qui peuvent apporter une solution industrielle très intéressante pour développer des contrôleurs qui assurent adaptative aux différentes conditions de route.Aussi des stratégies de commande tolérante aux défauts actionneurs ont été établi en exploitant les caractéristiques de la commande LPV pour compenser la perte de certains actionneurs (en sachant que la voiture est un système sur actionné). Des implémentations ont été effectuées sur des bancs de test et sur un véhicule réel pour prouver l'efficacité des stratégies
The main issue of this thesis is to work out new Global Chassis MIMO controllers that enhance the overall dynamics of the vehicle while preserving the vehicle stability in critical driving situations. Many innovative strategies have been explored and finalized to deal with these problematics. Various solutions have been given to deal with the vehicle stability and performance objectives. Indeed, many works based on the LPV/Hinf approach have been developed to control simultaneously the braking, steering and suspension actuators. On the other hand, innovative road profile estimation strategies have been introduced and validated via experimental procedures, providing new cheap and easily implementable techniques to estimate the road profile characteristics. Then, the vehicle control is adapted, depending on the road roughness (since it influences greatly the behaviour and the stability of the car). Several fault tolerant control strategies have been also considered to handle the actuators failures while keeping the vehicle stability, safety and enhancing the dynamical behaviour of the car in dangerous and critical driving situations.The general content of this thesisis as follows :-PART I : Theoretical backgrounds and vehicle modeling.-PART II : Road adaptive control vehicle dynamics.-PART III : Global chassis control using several actuators.Also, during this thesis and using the previous works of the advisors and the thesis results, a Matlab ToolBox "Automotive" has been developed to provide a bench test for the different automotive control studies. Implementations on test beds and real vehicle are also achieved to prove the efficiency of the proposed strategies

Guthrie, Kyle Thomas. "Linear Parameter Varying Path Following Control of a Small Fixed Wing Unmanned Aerial Vehicle". Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/23740.

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A mathematical model of a small fixed-wing aircraft was developed through application of parameter estimation techniques to simulated flight test data. Multiple controllers were devised based on this model for path following, including a self-scheduled linear parameter-varying (LPV) controller with path curvature as a scheduling parameter. The robustness and performance of these controllers were tested in a rigorous MATLAB simulation environment that included steady winds and gusts, measurement noise, delays, and model uncertainties. The linear controllers designed within were found to be robust to the disturbances and uncertainties in the simulation environment, and had similar or better performance in comparison to a nonlinear control law operating in an inner-outer loop structure. Steps are being taken to implement the resulting controllers on the unmanned aerial vehicle (UAV) testbed in the Nonlinear Systems Laboratory at Virginia Tech.
Master of Science

Roche, Emilie. "Commande à échantillonnage variable pour les systèmes LPV : application à un sous-marin autonome". Phd thesis, Université de Grenoble, 2011. http://tel.archives-ouvertes.fr/tel-00721970.

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L'utilisation de correcteur discret à période d'échantillonnage variable peut être intéressante dans plusieurs cas, par exemple lorsque la mesure, bien qu'envoyée de façon périodique, est reçue à intervalle variable. C'est le cas en milieu marin lorsque la mesure d'altitude est effectuée avec un capteur à ultrason (la durée du trajet du signal dans l'eau dépend de la distance par rapport au fond). Le délai variable entre deux réceptions de mesures, peut être vu comme une variation de période d'échantillonnage pour le contrôleur. La synthèse de lois de commande discrète à période d'échantillonnage variable a déjà été étudiée pour des systèmes stationnaires. On se propose ici d'étendre cette méthode pour des systèmes Linéaires à Paramètres Variants (LPV), qui permettent de conserver des paramètres importants d'un système non-linéaire en temps que paramètres d'un système linéaires. La synthèse de contrôleur repose sur le méthodologie H∞, appliquée aux systèmes LPV. En particulier, on s'intéressera à deux approches existantes dans la littérature : l'approche polytopique (où le paramètre variant évolue dans un volume convexe) et la Représentation Linéaire Fractionnelle (LFR). La méthode proposée est appliquée au contrôle d'un AUV (Autonomous Underwater Vehicle), qui est système difficile à contrôler du fait d'importantes non-linéarités. Des résultats de simulations permettront de montrer l'intérêt de la méthode pour le contrôle d'altitude d'un AUV, et notamment les améliorations apportées par l'ajout de paramètres issus du système non-linéaire au modèle utilisé pour la synthèse des régulateurs.

Bui-Tuan, Viet Long. "Stability and stabilization of linear parameter-varying and time-varying delay systems with actuators saturation". Electronic Thesis or Diss., Amiens, 2022. http://www.theses.fr/2022AMIE0082.

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La thèse est consacrée au développement d'une méthodologie de stabilité et de stabilisation pour les systèmes linéaires paramètres-dépendants et à retard soumis à la saturation de la commande. Dans le processus industriel, l'amplitude du signal de commande est généralement limitée par les contraintes de sécurité, les limites du cycle physique, etc. Pour cette raison, un outil de synthèse et d'analyse approprié est nécessaire pour décrire avec précision les caractéristiques des systèmes saturés à paramètres linéaires variables. Dans la première partie, une forme dépendante des paramètres de la condition de secteur généralisée (GSC) est considérée pour résoudre le problème de stabilisation saturée. Plusieurs stratégies de contrôle de rétroaction sont étudiées pour stabiliser les systèmes LPV/qLPV saturés. Conditions de stabilisation nécessaires et suffisantes via la formulation d'inégalité matricielle linéaire paramétrée proposée pour les contrôleurs de retour d'état conformes aux exigences de conception (c'est-à-dire l'ensemble admissible des conditions initiales, la région estimée du domaine de convergence asymptotique, la stabilité et les performances robustes sous l'influence des perturbations, etc.). La relaxation des PLMI conçus est illustrée par les résultats de comparaison à l'aide d'une fonction de Lyapunov dépendante des paramètres. Dans la deuxième partie, les développements de stabilité dépendant du délai basés sur la fonctionnelle de Lyapunov-Krasovskii (LKF) sont présentés. Les techniques modernes de limitation avancées sont utilisées avec un équilibre entre conservatisme et complexité de calcul. Ensuite, des analyses de stabilisation de saturation pour les contrôleurs d'ordonnancement de gain. Inspirée des méthodes de système à retard incertain, une nouvelle condition de stabilisation est dérivée de l'analyse de stabilisation dépendante du retard pour le système à retard LPV soumis à des contraintes de saturation. Dans cet aspect, les contrôleurs de rétroaction à programmation de gain stabilisants améliorent les performances et la stabilité du système saturé et fournissent un grand domaine d'attraction. On peut souligner que la formulation dérivée est générale et peut être utilisée pour le contrôle de la conception de nombreux systèmes dynamiques. Enfin, pour maximiser la région d'attraction tout en garantissant la stabilité asymptotique du système en boucle fermée, un problème d'optimisation est inclus dans la stratégie de conception de commande proposée
The dissertation is devoted to developing a methodology of stability and stabilization for the linear parameter-dependent (PD) and time-delay systems (TDSs) subject to control saturation. In the industrial process, control signal magnitude is usually bounded by the safety constraints, the physical cycle limits, and so on. For this reason, a suitable synthesis and analysis tool is needed to accurately describe the characteristics of the saturated linear parameter-varying (LPV) systems. In the part one, a parameter-dependent form of the generalized sector condition (GSC) is considered to solve the saturated stabilization problem. Several feedback control strategies are investigated to stabilize the saturated LPV/qLPV systems. Necessary and sufficient stabilization conditions via the parameterized linear matrix inequality (PLMI) formulation proposed for the feedback controllers conforming to the design requirements (i.e., the admissible set of the initial conditions, the estimated region of the asymptotic convergence domain, the robust stability and performance with the influence of perturbations, Etc.). The relaxation of the designed PLMIs is shown through the comparison results using a parameter-dependent Lyapunov function (PDLF). In the second part, the delay-dependent stability developments based on Lyapunov-Krasovskii functional (LKF) are presented. The modern advanced bounding techniques are utilized with a balance between conservatism and computational complexity. Then, saturation stabilization analyzes for the gain-scheduling controllers. Inspired by uncertain delay system methods, a novel stabilization condition is derived from the delay-dependent stabilizing analysis for the LPV time-delay system subject to saturation constraints. In this aspect, the stabilizing gain-scheduling feedback controllers improve the performance and stability of the saturated system and provide a large attraction domain. It can be emphasized that the derived formulation is general and can be used for the design control of many dynamic systems. Finally, to maximize the attraction region while guaranteeing the asymptotic stability of the closed-loop system, an optimization problem is included to the proposed control design strategy

Sigthorsson, David O. "Control-Oriented Modeling and Output Feedback Control of Hypersonic Air-Breathing Vehicles". The Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=osu1228230786.

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Hernandez, Torres David. "Commande robuste de générateurs électrochimiques hybrides". Thesis, Grenoble, 2011. http://www.theses.fr/2011GRENT075/document.

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Abstract (sommario):

L'objectif de cette thèse est la conception, dans un premier temps, des différentes stratégies de commande pour un générateur hybride composé par une pile à combustible et une source auxiliaire de stockage d'énergie. L'outil des Inégalités Linéaires Matricielles (LMI) est utilisé dans la thèse pour la solution du problème de la commande robuste et multi-variables. Dans un premier temps la commande se consacre à la gestion de la partie électrique de la pile. Des stratégies de commande sont proposées pour les convertisseurs élévateurs du bus continu mais aussi pour le contrôle d'un onduleur de tension conçu pour une opération en mode isolé du réseau. La validation d'une partie du contrôle sous un banc d'essai a été réalisée. Dans un deuxième temps, la commande de la partie fluidique de la pile a été traitée. La gestion de la dynamique de l'air en entrée de la pile est assurée par la commande du débit du compresseur. Le sous-système de compression d'air est régulé pour garantir un certain taux d'excès d'oxygène désiré, ce qui permet d'améliorer les performances de la pile. Une introduction au contrôle des systèmes à paramètres variants (LPV) est aussi présentée. Des études de robustesse des contrôleurs proposés ont été effectuées, et ces caractères robustes sont comparés avec plusieurs méthodes de commande classique, prouvant ainsi l'importance des méthodologies de commande robuste et multi-variables
The objective of this thesis is the design of several control strategies for a hybrid power generator composed by a fuel cell and an auxiliary energy storage source. The Linear Matrix Inequalities (LMI) tools are extensively used in this dissertation as a solution to the mutivariable robust control problem. As a first approach, the control methodology is consecrated to the electrical power management sub-system of the fuel cell. Different strategies are proposed to control the hybrid boost power converter configuration for DC voltage applications. The methodology is extended to AC islanded applications considering the additional control of a voltage inverter. The validation on a dedicated test-bench, of a part of the proposed control strategies, is presented. In a second approach, the control of the air supply system is addressed. The management of the air dynamic entering the fuel cell is assured by the control of the air flow of a compressor. The air supply sub-system is controlled to keep a desired oxygen excess ratio, this allow to improve the fuel cell performance. An introduction to the control of Linear Varying Parameter (LPV) systems is also presented. Robustness analysis studies are performed, these robust properties are contrasted with several classic control strategies, demonstrating the advantage and the importance of multivariable robust methodologies

Nguyen, Manh Quan. "LPV approaches for modelling and control of vehicle dynamics : application toa small car pilot plant with ER dampers". Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAT091/document.

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Abstract (sommario):

La suspension joue un rôle central pour la dynamique verticale d’un véhicule automobile afin d’améliorer le confort des passagers et la tenue de route. Les travaux de recherche de cette thèse sont divisés en deux grandes parties. La première partie considère le problème de commande d’une suspension semi-active dont le défi principal est de prendre en compte les contraintes de dissipativité et de débattement maximum des amortisseurs. Celles-ci sont transformées en des contraintes sur la commande et l’état d‘un système linéaire. Deux approches sont alors proposées pour la synthèse de la commande de la suspension semi-active : la commande Linéaire à Paramètres Variants (LPV) avec prise en compte de la saturation et la Commande Prédictive à base de Modèle (MPC).La deuxième partie est consacrée à l’estimation de défaut actionneur et à la commande Tolérante à ce type de défauts, avec comme application majeure le système de suspension semi-active. On considère ici comme défaut une perte de puissance de l’amortisseur (par exemple une fuite de l’huile), qui est estimée en utilisant plusieurs approches fondées sur des observateurs d’état. Puis, en fonction de l’estimation du défaut, la commande en boucle fermée est reconfigurée afin de conserver des performances pour la dynamique verticale du véhicule
Semi-active suspension system plays a key role in enhancing comfort and road holding of vertical dynamics in automotive vehicles. This PhD thesis research work, focused on that topic, is divided into two main parts. The first one considers the semi-active suspension control problem, the main challenge of which being to handle the dissipativity constraint and suspensions stroke limitation of semi-active dampers. These constraints are recast into input and state constraints in a linear state space representation. Thereby, the semi-active suspension control is designed in the framework of Linear Parameter Varying (LPV) approach with input constraints, and of Model Predictive Control (MPC) approach.The second part is devoted to Fault Estimation and Fault Tolerant Control (FTC) in case of actuator fault, and its application to Semi-Active suspension systems. The fault considered here is the loss of actuator's efficiency (due to an oil leakage of the damper for instance when a ), which is estimated using several observer-based approaches. Then, thanks to the fault information from the estimation step, an LPV/FTC fault scheduling control is designed to limit the vehicle performance deterioration

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Libri sul tema "Robust LPV Control":

Zhang, Hui, Rongrong Wang e Junmin Wang. Robust Gain-Scheduled Estimation and Control of Electrified Vehicles via LPV Technique. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-8509-6.

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Wang, Junmin, Rongrong Wang e Hui Zhang. Robust Gain-Scheduled Estimation and Control of Electrified Vehicles Via LPV Technique. Springer, 2023.

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Capitoli di libri sul tema "Robust LPV Control":

Gáspár, Péter, Zoltán Szabó, József Bokor e Balázs Németh. "Robust Control of LPV Systems". In Robust Control Design for Active Driver Assistance Systems, 71–92. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-46126-7_3.

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Gáspár, Péter, Zoltán Szabó, József Bokor e Balázs Németh. "Modeling of LPV Systems". In Robust Control Design for Active Driver Assistance Systems, 11–70. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-46126-7_2.

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Lovera, Marco, Marco Bergamasco e Francesco Casella. "LPV Modelling and Identification: An Overview". In Robust Control and Linear Parameter Varying Approaches, 3–24. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-36110-4_1.

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Henrion, Didier. "Positive Polynomial Matrices for LPV Controller Synthesis". In Robust Control and Linear Parameter Varying Approaches, 87–96. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-36110-4_4.

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Halimi, Meriem, Gilles Millerioux e Jamal Daafouz. "Polytopic Observers for LPV Discrete-Time Systems". In Robust Control and Linear Parameter Varying Approaches, 97–124. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-36110-4_5.

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Németh, Balázs, e Péter Gáspár. "Guaranteeing Performance Requirements for Suspensions via Robust LPV Framework". In Advances in Industrial Control, 153–62. Cham: Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-30537-5_10.

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Rotondo, Damiano. "Robust State-Feedback Control of Uncertain LPV Systems". In Advances in Gain-Scheduling and Fault Tolerant Control Techniques, 75–99. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-62902-5_4.

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Formentin, Simone, Giulio Panzani e Sergio M. Savaresi. "VRFT for LPV Systems: Theory and Braking Control Application". In Robust Control and Linear Parameter Varying Approaches, 289–309. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-36110-4_11.

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Henry, David. "Design of Norm Based Fault Detection and Isolation LPV Filters". In Robust Control and Linear Parameter Varying Approaches, 125–80. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-36110-4_6.

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Rotondo, Damiano. "Fault Tolerant Control of LPV Systems Using Robust State-Feedback Control". In Advances in Gain-Scheduling and Fault Tolerant Control Techniques, 147–74. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-62902-5_7.

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Atti di convegni sul tema "Robust LPV Control":

Evangelisti, Luca, e Manuel Pusch. "Probabilistic Robust LPV Control". In 2021 American Control Conference (ACC). IEEE, 2021. http://dx.doi.org/10.23919/acc50511.2021.9483239.

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Shi, Fengming, e Ron J. Patton. "A robust LPV fault detection approach using parametric eigenstructure assignment". In 2012 UKACC International Conference on Control (CONTROL). IEEE, 2012. http://dx.doi.org/10.1109/control.2012.6334675.

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Zhang, Jin, e Donald J. Chmielewski. "Robust and LPV Economic Linear Optimal Control". In 2019 American Control Conference (ACC). IEEE, 2019. http://dx.doi.org/10.23919/acc.2019.8814984.

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Bennani, S., D. Willemsen, C. Scherer, C. Scherer, S. Bennani e D. Willemsen. "Robust LPV control with bounded parameter rates". In Guidance, Navigation, and Control Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1997. http://dx.doi.org/10.2514/6.1997-3641.

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Blesa, Joaquim, Yolanda Bolea e Vicenc Puig. "Robust fault detection using interval LPV models". In European Control Conference 2007 (ECC). IEEE, 2007. http://dx.doi.org/10.23919/ecc.2007.7068814.

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Wei, Xiukun, L. Del Re e Jindong Tan. "Robust adaptive control of quasi-LPV systems". In 2005 IEEE/ASME International Conference on Advanced Intelligent Mechatronics. IEEE, 2005. http://dx.doi.org/10.1109/aim.2005.1511243.

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Lejun Chen, R. J. Patton e S. Klinkhieo. "Robust LPV Estimator Approach to Friction Diagnosis". In UKACC International Conference on CONTROL 2010. Institution of Engineering and Technology, 2010. http://dx.doi.org/10.1049/ic.2010.0279.

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Fainekos, Georgios E., e George J. Pappas. "MTL robust testing and verification for LPV systems". In 2009 American Control Conference. IEEE, 2009. http://dx.doi.org/10.1109/acc.2009.5159969.

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Ilka, Adrian, e Vojtech Vesely. "Robust LPV-based infinite horizon LQR design". In 2017 21st International Conference on Process Control (PC). IEEE, 2017. http://dx.doi.org/10.1109/pc.2017.7976194.

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Venkataraman, Raghu, e Peter Seiler. "Robust LPV estimator synthesis using integral quadratic constraints". In 2016 American Control Conference (ACC). IEEE, 2016. http://dx.doi.org/10.1109/acc.2016.7526079.

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