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Littérature scientifique sur le sujet « Decoupling application »

Auteur : Grafiati

Publié le 1 février 2025

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Articles de revues sur le sujet "Decoupling application"

Liu, Kaixin, Yang Liu, Fazhi Song et Jiubin Tan. « Dynamic Decoupling Method Based on Motor Dynamic Compensation with Application for Precision Mechatronic Systems ». Energies 17, n^o 9 (25 avril 2024) : 2038. http://dx.doi.org/10.3390/en17092038.

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Motors are widely employed in mechatronic systems, especially in precision multiple degrees of freedom motion systems. In most applications, the dynamic equation between the motor instruction and the actual driving force is simplified as a constant. Subsequently, the static decoupling method can be utilized to design the feedback controller. However, in high-precision mechatronic systems, motor dynamics cannot be neglected, and the static decoupling performance is compromised due to discrepancies between motors. In this paper, a dynamic decoupling method is developed to improve the decoupling performance of the multiple-input multiple-output systems. The effects of transmission delays, motor dynamics, and discrepancies between different motors are taken into consideration in the dynamic decoupling method. Furthermore, a data-driven optimization method is developed to estimate the parameters of the dynamic decoupling controller. The effectiveness and superiority of the proposed method are demonstrated through numerical simulations. The experimental results show that the dynamic decoupling control method can achieve a 97.75% performance improvement at least compared to the static decoupling control method.

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Wang, Shangjiu, Shaohua Zhang et Liang Cheng. « Drivers and Decoupling Effects of PM2.5 Emissions in China : An Application of the Generalized Divisia Index ». International Journal of Environmental Research and Public Health 20, n^o 2 (4 janvier 2023) : 921. http://dx.doi.org/10.3390/ijerph20020921.

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Although economic growth brings abundant material wealth, it is also associated with serious PM2.5 pollution. Decoupling PM2.5 emissions from economic development is important for China’s long-term sustainable development. In this paper, the generalized Divisia index method (GDIM) is extended by introducing innovation indicators to investigate the main drivers of PM2.5 pollution in China and its four subregions from 2008 to 2017. Afterwards, a GDIM-based decoupling index is developed to examine the decoupling states between PM2.5 emissions and economic growth and to identify the main factors leading to decoupling. The obtained results show that: (1) Innovation input scale and GDP are the main drivers for increases in PM2.5 emissions, while innovation input PM2.5 intensity, emission intensity, and emission coefficient are the main reasons for reductions in PM2.5 pollution. (2) China and its four subregions show general upward trends in the decoupling index, and their decoupling states turn from weak decoupling to strong decoupling. (3) Innovation input PM2.5 intensity, emission intensity, and emission coefficient contribute largely to the decoupling of PM2.5 emissions. Overall, this paper provides valuable information for mitigating haze pollution.

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Brilakis, Demetrios S., Demetrios E. Tsesmelis et Efthimios Zervas. « Development and application of energy decoupling index as Cartesian Vector : evidence from world-wide regional data ». IOP Conference Series : Earth and Environmental Science 899, n^o 1 (1 novembre 2021) : 012027. http://dx.doi.org/10.1088/1755-1315/899/1/012027.

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Abstract Economic growth and energy consumed is critical for sustainable global development. In this paper, an extended Vector version of the commonly used Decoupling Index De of energy elasticity to Gross Domestic Product (GDP) and Decoupling Ratio of Energy Intensity of GDP are used to investigate decoupling phenomenon for the period 1990 to 2014 in the main regions of the World. Using Vector properties, this study overcomes some well-known deficiencies of Energy to Growth elasticity Decoupling Index and suggests the Decoupling Angle as a suitable indicator when describing decoupling. The relationships with aggregate and per capita indicators are also examined. A general finding was that in emerging economies, even when moving to “disconnected” states of decoupling, reduced energy rates were paired with reduced growth rates and accelerated growth rates with increased energy consumption rates. This statement raises questions over long-term decoupling of energy consumption from economic growth.

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Zhang, Yankai. « The Scope of Application of Power Decoupling Technology and Its Evolution ». Highlights in Science, Engineering and Technology 81 (26 janvier 2024) : 182–87. http://dx.doi.org/10.54097/1z1a6p54.

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As energy consumption worldwide continues to escalate, the gap between energy supply and demand is becoming alarmingly evident. This disparity, combined with the mounting environmental threats impacting production and human existence, intensifies the energy challenges our nation confronts. At the heart of addressing these issues is the imperative to maximize energy efficiency. Within the realm of power electronics, the topic of power decoupling has emerged as a pivotal area of research. This paper delves into the application of power decoupling in power electronics, offering a comprehensive analysis of its characteristics and applicability. Tracing its evolutionary trajectory, the paper systematically explores the historical progression of power decoupling technology. It further segments the technology, elucidating its merits, limitations, and mechanisms for enhancement. By aggregating data, the study categorizes various inverters and contrasts their roles in the domain of power decoupling. Subsequently, the discourse distinguishes between active and reactive power decoupling, providing prevalent examples of the former. The paper concludes by affirming the trajectory of power decoupling towards increased cleanliness and efficiency. The emphasis on high-precision and high-efficiency apparatuses heralds the anticipated future direction of this field.

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Qin, Lei, Li Kun Wang, Yu Lu et Jing Jing Zhou. « Cross Coupling Effect in Multi-Element Composites for Transducer Array Application ». Applied Mechanics and Materials 275-277 (janvier 2013) : 1650–53. http://dx.doi.org/10.4028/www.scientific.net/amm.275-277.1650.

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A novel three-phase (ceramic, epoxy resin and decoupling material) piezoelectric composite with multi-element in parallel connection has been developed by using dice-fill technology. This kind of composite consists of a large number of elements which can be seen as a single-sound radiation source. The space between elements is determined via a precise method of calculation. The ceramic elements are then cut using precision machinery to achieve exact results. A kind of decoupling material has been developed to decrease the cross coupling effect between elements. The vibration velocity curves of active elements and close elements were measured using a Scanning Laser Vibrometer (Polytec PSV-400). The results indicated that the decoupling materials induced in multi-element composites have a good decoupling effect. Vibration attenuations between adjacent elements are larger than 31 dB at resonance frequency.

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Klika, Karel D. « The Application of Simple and Easy to Implement Decoupling Pulse Scheme Combinations to Effect Decoupling of Large J Values with Reduced Artifacts ». International Journal of Spectroscopy 2014 (29 avril 2014) : 1–9. http://dx.doi.org/10.1155/2014/289638.

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Of the various problems in decoupling one nucleus type from another using standard decoupling pulse schemes for broadband decoupling, a particular challenge is to effect full, artifact-free decoupling when the size of the coupling constant is very large. Herein it is demonstrated that 1H decoupling of the 31P NMR spectrum of diethyl phosphonate {HP(=O)(OCH2CH3)2} can be accomplished with reduced artifacts despite the large JH,P1 value of 693 Hz by using a combination of decoupling pulse schemes involving continuous-wave (CW) irradiation and either adiabatic-pulse decoupling (APD), MPF decoupling, or traditional composite-pulse decoupling (CPD) schemes such as WALTZ or GARP. The considered strategy is simple, efficient, and easy to implement on most instruments. The best result was attained for a combination of CW and CPD using GARP with a standard pulse width of 60 μs. Altogether, the advantages of the methodology include low power requirements, complete decoupling, tolerance of a range of large J values, large bandwidth for normal-sized J values, and the suppression of sidebands.

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Shang, Ji Liang, et Da Hai Ren. « Boiler Combustion System of Multivariable Internal Model Control Application Research ». Advanced Materials Research 648 (janvier 2013) : 305–10. http://dx.doi.org/10.4028/www.scientific.net/amr.648.305.

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In the industrial process of common multivariable time delay input/output system, a multivariable decoupling internal model controller design method is put forward based on the internal model control structure, the method for the design of internal model controller has the function of decoupling and controller. The advantage has the ability to achieve approximate or complete decoupling in nominal system output response, the method is used on the multivariable strong coupling of the boiler combustion control system to design and simulation study, the simulation results prove the effectiveness of the method. And in the process model and process mismatch showed strong robustness and anti jamming ability.

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Liu, Wangyu, Zheng Liu, Zhengqiang Guo, Zhaoqi Chen et Weigui Xie. « Application of Poisson’s ratio structures and decoupling algorithm for 3D force sensing ». Measurement Science and Technology 35, n^o 6 (12 mars 2024) : 065105. http://dx.doi.org/10.1088/1361-6501/ad3018.

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Abstract Flexible tactile electronic devices are extensively used in the fields of robotics, medical detection, and human-computer interaction. Monitoring contact parameters, including force magnitude, direction, and contact location, is particularly vital for skin-like tactile sensing devices. Herein, a 3D force sensor is designed based on porous structure with deliberately designed Poisson’s ratios. A genetic algorithm (GA) optimized back propagation neuronal network (BPNN) model is proposed to support the 3D force decoupling, which can greatly improve the decoupling accuracy. The introduction of the GA-BPNN significantly enhances decoupling accuracy compared to the initial neural network. Micro-porous structures with varied Poisson’s ratios are embedded into the sensing unit to achieve better sensibility. Significantly, this study underscores that the decoupling accuracy of the force components along the Z-axis can be further improved by substituting the solid unit with a designed porous structure unit featuring a specific Poisson’s ratio in an arrayed 3D force sensor.

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Cotsaftis, M., M. Rouff, C. Vibet et J. Robert. « Application of decoupling method to Hamiltonian systems ». IEE Proceedings - Control Theory and Applications 142, n^o 6 (1 novembre 1995) : 595–602. http://dx.doi.org/10.1049/ip-cta:19952219.

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Pulat, B. M., et P. S. Pulat. « A decoupling inventory model and an application ». IEEE Transactions on Engineering Management 39, n^o 1 (1992) : 73–76. http://dx.doi.org/10.1109/17.119664.

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Thèses sur le sujet "Decoupling application"

Yu, Heng. « On Decoupling Concurrency Control from Recovery in Database Repositories ». Thesis, University of Waterloo, 2005. http://hdl.handle.net/10012/1084.

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We report on initial research on the concurrency control issue of compiled database applications. Such applications have a repository style of architecture in which a collection of software modules operate on a common database in terms of a set of predefined transaction types, an architectural view that is useful for the deployment of database technology to embedded control programs. We focus on decoupling concurrency control from any functionality relating to recovery. Such decoupling facilitates the compile-time query optimization.

Because it is the possibility of transaction aborts for deadlock resolution that makes the recovery subsystem necessary, we choose the deadlock-free tree locking (TL) scheme for our purpose. With the knowledge of transaction workload, efficacious lock trees for runtime control can be determined at compile-time. We have designed compile-time algorithms to generate the lock tree and other relevant data structures, and runtime locking/unlocking algorithms based on such structures. We have further explored how to insert the lock steps into the transaction types at compile time.

To conduct our simulation experiments to evaluate the performance of TL, we have designed two workloads. The first one is from the OLTP benchmark TPC-C. The second is from the open-source operating system MINIX. Our experimental results show TL produces better throughput than the traditional two-phase locking (2PL) when the transactions are write-only; and for main-memory data, TL performs comparably to 2PL even in workloads with many reads.

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Katabi, Dina 1971. « Decoupling congestion control and bandwidth allocation policy with application to high bandwidth-delay product networks ». Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/8000.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2003.
Includes bibliographical references (p. 124-129).
In this dissertation, we propose a new architecture for Internet congestion control that decouples the control of congestion from the bandwidth allocation policy. We show that the new protocol, called XCP, enables very large per-flow throughput (e.g., more than 1 Gb/s), which is unachievable using current congestion control. Additionally, we show via extensive simulations that XCP significantly improves the overall performance, reducing drop rate by three orders of magnitude, increasing utilization, decreasing queuing delay, and attaining fairness in a few RTTs. Using tools from control theory, we model XCP and demonstrate that, in steady state, it is stable for any capacity, delay, and number of sources. XCP does not maintain any per-flow state in routers and requires only a few CPU cycles per packet making it implementable in high-speed routers. Its flexible architecture facilitates the design and implementation of quality of service, such as guaranteed and proportional bandwidth allocations. Finally, XCP is amenable to gradual deployment.
by Dina Katabi.
Ph.D.

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Antony, Geo Johns. « Cheops reloaded, further steps in decoupling geo-distribution from application business logic : a focus on externalised sharding collaboration, consistency and dependency ». Electronic Thesis or Diss., Ecole nationale supérieure Mines-Télécom Atlantique Bretagne Pays de la Loire, 2024. http://www.theses.fr/2024IMTA0441.

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La transition du cloud computing centralisé vers des applications géo-distribuées est essentielle pour répondre aux exigences modernes de services à faible latence, haute disponibilité et résilience. Cependant, les solutions existantes de géo-distribution nécessitent souvent des modifications intrusives du code de l’application. Ma thèse étend Cheops, un middleware qui découple la géo-distribution de la logique applicative, offrant une solution non intrusive et générique pour déployer une application sur des instances géographiquement distribuées. S’appuyant sur les principes de Cheops, "local-first" et "collaborative-then", mes recherches introduisent Cross, un mécanisme de collaboration par fragmentation pour partitionner les ressources entre différents sites, ainsi qu’une nouvelle approche pour découplerla gestion de la cohérence de la logique applicative, garantissant la synchronisation entre les instances. De plus, la gestion des dépendances assure que les opérations effectuées sur une instance sont reproductibles à travers les instances géo-distribuées, maintenant l’illusion d’une application unifiée et localisée sur un seul site. Cheops utilise Scope-lang, un langage spécifique au domaine (DSL), pour faciliter cela sans modifier la logique de l’application. Cette extension de Cheops renforce davantage la séparation entre la géo-distribution et la logique métier de l’application
The shift from centralized cloud computing to geo-distributed applications is critical for meeting modern demands for low-latency, highly available, and resilient services. However, existing geo-distribution solutions often require intrusive modifications to application code. My thesis extends the Cheops framework, a middleware that decouples geodistribution from application logic, offering a non-intrusive and generic solution for deploying an application across geographically distributed instances. Building on the Cheops principles of "local-first" and "collaborative-then," my research introduces Cross, a shard collaboration mechanism for partitioning resources across sites, and a new approach to decoupling consistency from the application logic, ensuring synchronization between instances. Additionally, dependency management guarantees that operations performed on one instance are reproducible across geo-distributed instances, maintaining the illusion of a unified, singlesite application. Cheops uses Scope-lang, a Domain-Specific Language (DSL), to facilitate this without altering application logic. This extension of Cheops, further enhances the separation of geo-distribution from the application business logic

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Vitali, Vito. « Monte Carlo analysis of heterogeneity and core decoupling effects on reactor kinetics : Application to the EOLE critical facility ». Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASP045.

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L'analyse de la cinétique du réacteur est un élément clé pour la caractérisation du comportement non-stationnaire de la population neutronique lors de transitoires opérationnels ou accidentels. La dérivation des équations de la cinétique ponctuelle est intrinsèquement fondée sur le collapse de l'espace de phases associé à l'équation de Boltzmann (décrivant le transport des neutrons) en quelques paramètres efficaces permettant de représenter le réacteur comme un "point" , pourvu que la population neutronique obéisse au mode propre fondamental. La cinétique ponctuelle est très largement adoptée dans la communauté de la physique des réacteurs en tant qu'outil fiable et rapide pour l'analyse de la cinétique des cœurs. Toutefois, il est connu que l'utilisation des équations de la cinétique ponctuelle est pertinente seulement si le cœur est suffisamment homogène (pour que le collapse en un point soit une approximation raisonnable) et si le mode propre fondamental est suffisamment séparé des harmoniques supérieures (pour que la réduction au mode fondamental soit bien posée). L'objectif de cette thèse est de maitriser l'impact de la géométrie et des compositions matérielles du cœur sur la cinétique, en vue de la possibilité d'interpréter des données issues de l'expérience EPILOGUE (qui sera réalisée dans la maquette EOLE du CEA/Cadarache). A cette fin, une analyse spectrale par méthodes de Monte Carlo sera mise en place dans le code TRIPOLI-4 développé au SERMA, pour déterminer la séparation des modes propres et des valeurs propres du réacteur en fonction des caractéristiques du cœur
The analysis of the reactor core kinetics is key for the characterization of the non-stationary neutron population behavior during operational or accidental transients. Point-kinetics equations, whose derivation is intrinsically based on collapsing the full phase space of the Boltzmann equation into a few effective parameters (representing the whole reactor as a "point", provided that the entire neutron population obeys the fundamental eigen-mode), are widely used in the reactor physics community as a reliable and fast tool for the analysis of core kinetics. However, their use is deemed to be appropriate only when the core is sufficiently homogeneous (for the collapsing to a point to be a realistic approximation), and when the fundamental mode of the neutron population is sufficiently separated from higher harmonics (for the reduction to the fundamental mode to be meaningful). The goal of this thesis is to investigate the impact of system geometry and material compositions on the reactor kinetics, via an eigen- mode decomposition, in view of interpreting experimental data coming from the EPILOGUE experiments carried out at the EOLE critical facility (CEA/Cadarache). To this aim, spectral analysis techniques based on Monte Carlo methods will be implemented in the Monte Carlo code TRIPOLI-4 (developed at SERMA), so as to determine the separation between reactor eigen-modes and eigen-values as a function of the core features

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Le, Brun Christophe. « Analyse et commande de systèmes multivariables. Application à un turbopropulseur ». Thesis, CentraleSupélec, 2015. http://www.theses.fr/2015SUPL0012.

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Les travaux entrepris au cours de cette thèse ont permis de concevoir des stratégies de commande de systèmes multivariables (outils d’analyse et méthodes de synthèse) en vue de leur application au développement de lois de commande d’un turbopropulseur.D’un point de vue fonctionnel, un turbopropulseur est un système multivariable comprenant deux grandeurs de commande : le débit carburant à injecter dans la chambre de combustion et le pas de l’hélice, ainsi que deux grandeurs de sortie : la puissance délivrée par l’hélice et sa vitesse de rotation. Ces variables sont fortement couplées, ce qui signifie que des variations de l’une entraînent des écarts sur l’autre. L’objectif de ces travaux est de synthétiser des lois de commande facilement ajustables, permettant de respecter des spécifications classiques en Automatique (temps de réponse, dépassement, erreur statique) et de réduire les couplages entre les différentes grandeurs régulées. Dans ce contexte industriel, les approches décentralisées sans et avec découplage sont envisagées. La stratégie décentralisée pure met en œuvre un correcteur diagonal, ce qui revient à asservir un système par plusieurs boucles monovariables indépendantes. Bien que relativement facile à synthétiser et à implanter, la stratégie décentralisée ne permet pas d’atteindre les performances souhaitées en présence d’interactions importantes. Dans ce cas, il est possible de l’associer à des compensateurs permettant de diminuer les interactions.Une part importante de ces travaux de recherche concerne le développement méthodologique de ces stratégies. La définition d’une stratégie de commande est la première étape. Pour cela, la quantification du niveau d’interaction dans un système se révèle importante. Celle-ci peut être réalisée à l’aide de différentes méthodes et indicateurs qui s’appuient sur les réponses fréquentielles ou temporelles du système, ou encore sur les grammiens de commandabilité et d’observabilité. Une procédure systématique d’analyse des interactions a été proposée afin de déterminer la stratégie de commande la plus adaptée en fonction des interactions. Dans le cas où l’analyse des interactions conduit à adopter une stratégie décentralisée, les régulateurs peuvent être synthétisés à l’aide de méthodes monoboucles ou multiboucles. Les premières ne prennent pas en compte les interactions tandis que les secondes, plus élaborées mais également plus complexes à mettre en œuvre, permettent de les prendre spécifiquement en compte. A la suite de l’analyse de ces méthodes, une étude récapitulative présentant les méthodes préconisées en fonction du procédé et des objectifs, est finalement proposée. Dans le cas où l’analyse des interactions montre un niveau de couplage trop important, il est possible d’associer des compensateurs à la régulation décentralisée. Les compensateurs ont pour but de découpler les commandes vis-à-vis des sorties du procédé. Différentes méthodes et structures de découplage ont été étudiées et comparées. Une procédure de découplage, composée des méthodes considérées comme les plus efficaces a finalement été mise en place
In this Ph.D. thesis, we explore the different steps of designing a decentralized control applied on a turboprop engine.From the control point of view, the turboprop engine is a TITO (Two-Input Two-Output) process. The fuel flow is used to control the shaft power while the blade pitch angle is used to control the propeller speed. The turboprop presents important couplings between manipulated variables and controlled variables. When the fuel flow changes, the propeller speed is impacted. Similarly, when controlling the blade pitch angle to change the propeller speed to another level, the shaft power is affected, particularly during the transient states. The main objective of this research thesis is to design control laws for the turboprop. Beside technical specifications like response time and overshoot, couplings between loops have to be reduced as much as possible and control laws have to be robust to model uncertainties. For this industrial environment a decentralized strategy (with or without compensators) has been chosen. The decentralized strategy consists in designing monoloop controllers in order to drive the multivariable system. The decentralized strategy presents important benefits, such as flexibility as well as design simplicity, but is not efficient in presence of heavy couplings. In that case, it is possible to use compensators that reduce existing process interactions before designing the monoloop controllers.An important part of this work focuses on the development of these different strategies.The first step is the choice of the control structure, which strongly depends on the level of interaction. Despite the availability of different metrics - based on frequential responses, temporal responses, or Gramian – it is not easy to know which one is the most appropriate. Based on the analysis of couplings with different metrics, a procedure is proposed in order to choose the structure and the controllers design method.If the coupling analysis leads to adopt a decentralized strategy, the controllers can be designed using monoloop or multiloop methods. The first ones are simple but do not take couplings into account, whereas multiloop methods take specifically couplings into account but are more complicated. These tuning methods have been studied and recommendations have finally been made to choose the most appropriated method depending on the process and the requirements.In cases where the couplings analysis reveals a high couplings level, compensators can be associated with the decentralized strategy. The objectives of the compensators are to reduce couplings in the system and to facilitate the design of monoloop controllers. Several decoupling structures have been studied and compared. A decoupling procedure has then been proposed.These methodological studies have been applied to the turboprop engine. Following the coupling analysis, a decentralized strategy with decoupling has been chosen. After following the decoupling procedure and trying different solutions, the inverted decoupler has been adopted. Considering the dynamics of the system and the total decoupling provided by the inverted decoupler, PI controllers have been used and a monoloop tuning method has been chosen. In order to guarantee the desired performances over the whole flight envelope, control laws have been interpolated, using a gain scheduling technique. The structured singular value approach has then been used to demonstrate the robustness of the control laws with model uncertainties. Control laws have finally been implemented in the control software and simulation results have illustrated their good performances

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Heiland, Jan [Verfasser], Volker [Akademischer Betreuer] Mehrmann, Michael [Akademischer Betreuer] Hinze et Tomás [Akademischer Betreuer] Roubicek. « Decoupling and optimization of differential-algebraic equations with application in flow control / Jan Heiland. Gutachter : Michael Hinze ; Volker Mehrmann ; Tomas Roubicek. Betreuer : Volker Mehrmann ». Berlin : Technische Universität Berlin, 2014. http://d-nb.info/1067386157/34.

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Yang, Jiaming. « Melting in the Mantle Wedge : Quantifying the Effects of Crustal Morphology and Viscous Decoupling on Melt Production with Application to the Cascadia Subduction Zone ». PDXScholar, 2017. https://pdxscholar.library.pdx.edu/open_access_etds/3880.

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Arc magmatism is sustained by the complex interactions between the subducting slab, the overriding plate, and the mantle wedge. Partial melting of mantle peridotite is achieved by fluid-induced flux melting and decompression melting due to upward flow. The distribution of melting is sensitive to temperature, the pattern of flow, and the pressure in the mantle wedge. The arc front is the surface manifestation of partial melting in the mantle wedge and is characterized by a narrow chain of active volcanoes that migrate in time. The conventional interpretation is that changes in slab dip angle lead to changes in the arc front position relative to the trench. We explore an alternative hypothesis: evolution of the overlying plate, specifically thickening of the arc root, causes arc front migration. We investigate the effects of varying crustal morphology and viscous decoupling of the shallow slab-mantle interface on melt production using 2D numerical models involving a stationary overriding plate, a subducting plate with prescribed motion, and a dynamic mantle wedge. Melt production is quantified using a hydrous melting parameterization. We conclude: 1) Localized lithospheric thickening shifts the locus of melt production trenchward while thinning shifts melting landward. 2) Inclined LAB topography modulates the asthenospheric flow field, producing a narrow, well-defined arc front. 3) Thickening of the overriding plate exerts increased torque on the slab, favoring shallowing of the dip angle. 4) Viscous decoupling produces a cold, stagnant forearc mantle but promotes arc front melting due to reduction in the radius of corner flow, leading to higher temperatures at the coupling/decoupling transition.

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Sifi, Mohcine. « Diagnostic à base de modèles non linéaires. : Application au circuit carburant d'une turbomachine ». Thesis, Bordeaux, 2015. http://www.theses.fr/2015BORD0054/document.

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Les systèmes de régulation des turbomoteurs actuels sont basés sur des architectures complexes que les constructeurs tendent à rendre plus modulaires avec des technologies plus économiques tout en garantissant un niveau de fiabilité supérieur ou égal. Dans ce contexte, la surveillance du circuit carburant, qui a pour but de déceler les dysfonctionnements des composants hydrauliques critiques, permet de réduire le coût de maintenance, d'améliorer le niveau de maintenabilité et d'assurer la disponibilité des turbomoteurs. La présente étude porte sur l'élaboration de méthodes de diagnostic performantes et robustes permettant la détection et la localisation des défauts impactant les fonctions hydrauliques primaires du circuit carburant. Des méthodes existantes de génération de résidus à base de modèles non linéaires sont présentées et appliquées au cas du circuit carburant. L'approche analytique pour le découplage, combinée avec des filtres de Kalman étendus, permet la structuration des résidus pour assurer la localisation des défauts. Une nouvelle approche basée sur la théorie de platitude différentielle est proposée pour le diagnostic de défauts des systèmes non linéaires avec une application au cas du circuit carburant. Les différentiateurs à modes glissants sont utilisés pour l'estimation des dérivées de signaux nécessaires à l'application de certaines méthodes de génération de résidus. Des simulations numériques illustrent la pertinence des résultats obtenus. Une application expérimentale est présentée en utilisant un jeu de données réelles issues d'un banc d'essais partiel et fournies par la société Turbomeca du groupe SAFRAN
The current gas turbine regulation systems are based on complex architectures that manufacturers tend to make more modular with more cost effective technologies while ensuring a greater or equal level of reliability. In this context, the fuel system health monitoring, which aims to identify critical hydraulic components dysfunction, allows to reduce maintenance costs, to improve maintainability level and to ensure gas turbine availability. The present study focuses on the development of performant and robust diagnosis methods for the detection and isolation of faults affecting primary fuel system hydraulic functions. Existing nonlinear model based residual generation methods are presented and applied to the fuel system. The analytical approach for decoupling, combined with extended Kalman filters, helps fault isolation by generating residual structures. A new approach based on differential flatness theory is proposed for nonlinear systems fault diagnosis with an application to the fuel system. Sliding mode differentiators are used to estimate derived signals that are necessary for the application of some residual generation methods. Numerical simulations illustrate the efficiency of obtained results. An experimental application is presented using a real data set from a partial test bench provided by Turbomeca company of the SAFRAN group

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Délémontey, Bertrand. « Contribution à la commande des entraînements asynchrones de forte puissance : application au problème de traction ». Vandoeuvre-les-Nancy, INPL, 1995. http://www.theses.fr/1995INPL154N.

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L’objectif de ce travail est l'étude de la commande découplée du flux et du couple pour des machines asynchrones de forte puissance. Celle-ci concerne l'ensemble alimentation-machine-charge. Des problèmes spécifiques apparaissent dus à la forte puissance et à la configuration de l'alimentation: découplage flux-couple, instabilité de la chaîne complète. Notre travail porte tout d'abord sur l'étude théorique de la commande découplée du flux et du couple: un découplage prenant en compte les constantes de temps naturelles du moteur a été obtenu. Puis, après avoir mis en évidence de manière théorique les problèmes d'instabilité constatés expérimentalement, nous montrons que l'on ne peut à la fois assurer le découplage couple/flux et la stabilisation. Une solution de compromis a été trouvée par une technique de stabilisation prenant en compte le filtre d'entrée. Diverses commandes lui ont été associées dont une commande de type H2, assurant des résultats satisfaisants sur toute la plage de vitesse ou cette commande peut être mise en œuvre. L’ensemble de la commande a été implanté sur une carte industrielle et testé expérimentalement sur un banc de 300 kW. Cette étude a été réalisée en collaboration avec la société GEC ALSTHOM TRANSPORT dans le cadre général de la conception de chaines de traction asynchrone pour le TGV de nouvelle génération

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Oke, Adetola. « Disturbance Decoupling Problem for Discrete-Event Systems with Applications ». Thesis, Southern Illinois University at Edwardsville, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10127217.

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This thesis presents the new investigations on the disturbance decoupling problem (DDP) for the geometric control of max-plus linear systems, which are used to model discrete event systems such as transportation networks, queuing systems, and communication networks. The classical DDP concept in the geometric control theory means that the controlled outputs will not be changed by any disturbances. In practical manufacturing systems, solving for the DDP would require further delays on the output parts than the existing delays caused by the system breakdown, which will be less practical in real applications. The new proposed modified disturbance decoupling problem (MDDP) in this thesis ensures that the controlled output signals will not be delayed more than the existing delays caused by the disturbances in order to achieve the just-in-time optimal control. Furthermore, this thesis presents the integration of output feedback and open-loop control strategies to solve for the MDDP, as well as for the DDP. The main results of this thesis are illustrated by using timed event graph models of a high throughput screening system in drug discovery and a railway transport network.

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Livres sur le sujet "Decoupling application"

Gavito, Valentin F. Jr. Applications of eigenstructure assignment to design of robust mimo decoupling controllers and to reconfiguration algorithms for damaged flight control. Monterey, Calif : Naval Postgraduate School, 1986.

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Dharma, Harpal Singh. Application of decoupling control to robotic manipulators. 1985.

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Pena, Victor de la, et Evarist Gine. Decoupling : From Dependence to Independence (Probability and its Applications). Springer, 1998.

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Demeter, Ciprian. Fourier Restriction, Decoupling, and Applications. Cambridge University Press, 2019.

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Fourier Restriction, Decoupling and Applications. Cambridge University Press, 2020.

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Mayekar, Deepali. Decoupling Drupal : A Decoupled Design Approach for Web Applications. Apress, 2017.

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Wright, A. G. Voltage dividers. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780199565092.003.0013.

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Voltage dividers provide accelerating voltages to generate multiplier gain. Dynode voltages must remain constant and independent of the light input to maintain stable gain. The standard resistive divider never quite satisfies this requirement, although acceptable performance can be achieved by careful design. The inclusion of zener diodes improves performance but field-effect transistor (FET) circuits can provide gain stability at high mean anode currents, regardless of whether the application is pulsed or analogue. Design procedures for active and semi-active voltage dividers are presented. Dividers based on the Cockcroft–Walton (CW) principle are particularly suited to portable instrumentation because of their low standing current. Consideration is given to pulsed operation, decoupling, switch-on transients, ripple, dynode signals, single cable dividers, and equivalent circuits at high frequencies. Gating is used to protect a photomultiplier, in the presence of high light levels, by reducing the gain electronically. Various methods for gating a voltage divider are presented.

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Geiss, Stefan, et Juha Ylinen. Decoupling on the Wiener Space, Related Besov Spaces, and Applications to BSDEs. American Mathematical Society, 2021.

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Kachelriess, Michael. Quantum Fields. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198802877.001.0001.

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This book introduces quantum field theory, together with its most important applications to cosmology and astroparticle physics, in a coherent framework. The path-integral approach is employed right from the start, and the use of Green functions and generating functionals is illustrated first in quantum mechanics and then in scalar field theory. Massless spin one and two fields are discussed on an equal footing, and gravity is presented as a gauge theory in close analogy with the Yang–Mills case. Concepts relevant to modern research such as helicity methods, effective theories, decoupling, or the stability of the electroweak vacuum are introduced. Various applications such as topological defects, dark matter, baryogenesis, processes in external gravitational fields, inflation and black holes help students to bridge the gap between undergraduate courses and the research literature.

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Andersen, Jorgen Vitting. From Minority Games to $-Games. Sous la direction de Shu-Heng Chen, Mak Kaboudan et Ye-Rong Du. Oxford University Press, 2018. http://dx.doi.org/10.1093/oxfordhb/9780199844371.013.17.

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This chapter argues for the use of game theory or agent-based modeling to go beyond the standard methods used in traditional approaches to finance. The theory of rational expectations is at the core of most theories of finance in use since the 1970s, but it is also very unrealistic. This chapter first introduces some very general thoughts about elements needed in a new framework for finance. Then a few concrete examples of heterogeneous agent-based models will be introduced, and several of their main results will be discussed. Finally, applications and methods to real-market data will be introduced, notably the idea of “decoupling” to explain the short-lived synchronization of investors.

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Chapitres de livres sur le sujet "Decoupling application"

Liebscher, Stefan. « Application : Decoupling in Networks ». Dans Bifurcation without Parameters, 43–47. Cham : Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-10777-6_6.

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Joyce, Ger, Mariana Lilley, Trevor Barker et Amanda Jefferies. « Mobile Application Usability Heuristics : Decoupling Context-of-Use ». Dans Design, User Experience, and Usability : Theory, Methodology, and Management, 410–23. Cham : Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-58634-2_30.

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Castel, C., J. P. Chretien, G. Favier, M. Fliess, A. J. Fossard, M. Gauvrit, B. Gimonet et al. « Control by Reference Model : Application to Decoupling and Manoeuvrability in a Helicopter ». Dans The Digital Control of Systems, 321–39. Boston, MA : Springer US, 1989. http://dx.doi.org/10.1007/978-1-4615-6853-7_13.

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Król, Szymon, et Paweł Dworak. « An Application of the Dynamic Decoupling Techniques for a Nonlinear TITO Plant ». Dans Advanced, Contemporary Control, 381–92. Cham : Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-35170-9_36.

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Li, ShanShan. « Multi-color Garment Cutting and Decoupling Optimization Teaching Method Based on Data Mining Algorithm ». Dans Application of Big Data, Blockchain, and Internet of Things for Education Informatization, 204–10. Cham : Springer Nature Switzerland, 2023. http://dx.doi.org/10.1007/978-3-031-23947-2_22.

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Wang, Peng, Hao Meng et Qing-zhou Ji. « Application of PID Neural Network Decoupling Control in Deaerator Pressure and Deaerator Water Level Control System ». Dans Communications in Computer and Information Science, 15–25. Berlin, Heidelberg : Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-662-45289-9_2.

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Pilz, Christoph. « Vehicle Communication Platform to Anything-VehicleCAPTAIN ». Dans Intelligent Secure Trustable Things, 185–99. Cham : Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-54049-3_11.

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AbstractVehicle-to-everything (V2X) is on the verge of being integrated as an integral part of modern vehicles. However, the battle for the final V2X radio technology is still not decided, and the available message standards are complex, hindering research and development. Hence, in our work, we provide a toolbox for early-stage development within V2X, called vehicle communication platform to anything (vehicleCAPTAIN). The vehicleCAPTAIN toolbox comprises (i) a set of software that mitigates the need to adapt for different V2X hardware vendors by decoupling and simplifying implementation, (ii) a set of libraries that supports encoding and decoding of messages, and (iii) a set of software bindings to enable development with ROS2. All software is provided as free and open source (FOSS). Within this work, we prove the functionality of the toolbox with classic end-to-end tests, as well as Qosium, a quality-of-service testing application. Finally, we highlight the applicability and benefits of the vehicleCAPTAIN toolbox for early-stage V2X research and development.

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de la Peña, Víctor H., et Evarist Giné. « Further Applications of Decoupling ». Dans Probability and its Applications, 349–75. New York, NY : Springer New York, 1999. http://dx.doi.org/10.1007/978-1-4612-0537-1_8.

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Gonçalves Salsa Junior, Rubens, et Fai Ma. « Selected Applications ». Dans Advances in the Theory of System Decoupling, 109–34. Cham : Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-60846-0_4.

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Ye, Bo, Tao Li, Xiao Ding, Danyang Wang, Xin Luo et Hongrui Xiong. « Research and Application of Decoupling Method for Fuel System Testing in the Final Assembly Stage of Aircraft Complex Systems ». Dans Lecture Notes in Electrical Engineering, 71–82. Singapore : Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-6511-3_7.

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Actes de conférences sur le sujet "Decoupling application"

Mei, Ying. « Research on Efficient Decoupling Mechanism of Multi-bus Function in TCMS System ». Dans 2024 7th International Conference on Computer Information Science and Application Technology (CISAT), 586–91. IEEE, 2024. http://dx.doi.org/10.1109/cisat62382.2024.10695267.

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Xiong, Bao, Yongzhong Zhu, Leng Han et Wenxuan Xie. « A Low-profile Wideband Antenna Based on Decoupling Surface for Millimeter-wave Phased Array Application ». Dans 2024 IEEE 7th International Conference on Electronic Information and Communication Technology (ICEICT), 696–97. IEEE, 2024. http://dx.doi.org/10.1109/iceict61637.2024.10670782.

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Ying, Yiqun, Ming Rao et Sherman X. Shen. « Bilinear Decoupling Control and Its Industrial Application ». Dans 1992 American Control Conference. IEEE, 1992. http://dx.doi.org/10.23919/acc.1992.4792278.

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Watanabe, Hiroki, Jun-ichi Itoh et Quentin Roudier. « Single-phase power decoupling technique utilizing Hybrid method with passive and active power decoupling ». Dans 2018 IEEE International Power Electronics and Application Conference and Exposition (PEAC). IEEE, 2018. http://dx.doi.org/10.1109/peac.2018.8590577.

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He, Xiaohua George. « Adaptive Decoupling Control and Application in Sheet Production ». Dans 1993 American Control Conference. IEEE, 1993. http://dx.doi.org/10.23919/acc.1993.4793330.

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Xiu-Zhang Jin, Fei-Chao Yan et Shou-Hui Wang. « Algorithms research and application of decoupling internal model controller ». Dans 2012 International Conference on Machine Learning and Cybernetics (ICMLC). IEEE, 2012. http://dx.doi.org/10.1109/icmlc.2012.6359469.

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Chihani, Bachir, Emmanuel Bertin et Noel Crespi. « Decoupling context management and application logic : A new framework ». Dans 2013 IEEE 14th International Symposium on "A World of Wireless, Mobile and Multimedia Networks" (WoWMoM). IEEE, 2013. http://dx.doi.org/10.1109/wowmom.2013.6583486.

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Köppen, Marcel, Daniel Friesel, Christoph Borchert et Olaf Spinczyk. « Decoupling Application Logic from Persistent Memory Frameworks with AspectC++ ». Dans SOSP '21 : ACM SIGOPS 28th Symposium on Operating Systems Principles. New York, NY, USA : ACM, 2021. http://dx.doi.org/10.1145/3477113.3487269.

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Yaohong Qu, Lisha Chen et Jiang Qiu. « Application of non-cancellation decoupling in boom refueling control ». Dans 2009 International Conference on Mechatronics and Automation (ICMA). IEEE, 2009. http://dx.doi.org/10.1109/icma.2009.5246521.

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Aneke, N. P. I., J. Ackermann, T. Bunte et H. Nijmeijer. « Application of nonlinear disturbance decoupling to active car steering ». Dans 1999 European Control Conference (ECC). IEEE, 1999. http://dx.doi.org/10.23919/ecc.1999.7099650.

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Rapports d'organisations sur le sujet "Decoupling application"

Yang, Jiaming. Melting in the Mantle Wedge : Quantifying the Effects of Crustal Morphology and Viscous Decoupling on Melt Production with Application to the Cascadia Subduction Zone. Portland State University Library, janvier 2000. http://dx.doi.org/10.15760/etd.5768.

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Marshall, E., et M. Pica. Bearing Survivability and Friction Determination for Fuze Decoupling Applications. Fort Belvoir, VA : Defense Technical Information Center, septembre 2012. http://dx.doi.org/10.21236/ada565277.

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