Bibliografie tematiche / Electromechanical interactions

Letteratura scientifica selezionata sul tema "Electromechanical interactions"

Autore: Grafiati
Pubblicato: 8 giugno 2024

Cita una fonte nei formati APA, MLA, Chicago, Harvard e in molti altri stili

Scegli il tipo di fonte:

Consulta la lista di attuali articoli, libri, tesi, atti di convegni e altre fonti scientifiche attinenti al tema "Electromechanical interactions".

Accanto a ogni fonte nell'elenco di riferimenti c'è un pulsante "Aggiungi alla bibliografia". Premilo e genereremo automaticamente la citazione bibliografica dell'opera scelta nello stile citazionale di cui hai bisogno: APA, MLA, Harvard, Chicago, Vancouver ecc.

Puoi anche scaricare il testo completo della pubblicazione scientifica nel formato .pdf e leggere online l'abstract (il sommario) dell'opera se è presente nei metadati.

Indice

  1. Articoli di riviste
  2. Tesi
  3. Libri
  4. Capitoli di libri
  5. Atti di convegni

Articoli di riviste sul tema "Electromechanical interactions":

1

Niu, Dong Fang, Li Yang Xie e Teng Shao. "Research on the Design of Electromechanical Product Based on Interaction". Advanced Materials Research 569 (settembre 2012): 754–57. http://dx.doi.org/10.4028/www.scientific.net/amr.569.754.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
The informatization of manufacturing industry brings new requirements to the industrial design of electromechanical products with high degree of automation and high intelligence. One of the central design concerns is to guarantee reliability of the interactions between the operators and the products working in non-transparent conditions, and at the same time to provide pleasant user experience. Starting from the user’s behavior patterns and psychological needs, the paper analyzed human-machine interaction system of electromechanical products and the design principles of its constituent, and the suitability of the interactive environment of electromechanical products was provided.
2

Luo, Jianqiang, Siqi Bu e Jiebei Zhu. "Transition from Electromechanical Dynamics to Quasi-Electromechanical Dynamics Caused by Participation of Full Converter-Based Wind Power Generation". Energies 13, n. 23 (27 novembre 2020): 6270. http://dx.doi.org/10.3390/en13236270.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
Previous studies generally consider that the full converter-based wind power generation (FCWG) is a “decoupled” power source from the grid, which hardly participates in electromechanical oscillations. However, it was found recently that strong interaction could be induced which might incur severe resonance incidents in the electromechanical dynamic timescale. In this paper, the participation of FCWG in electromechanical dynamics is extensively investigated, and particularly, an unusual transition of the electromechanical oscillation mode (EOM) is uncovered for the first time. The detailed mathematical models of the open-loop and closed-loop power systems are firstly established, and modal analysis is employed to quantify the FCWG participation in electromechanical dynamics, with two new mode identification criteria, i.e., FCWG dynamics correlation ratio (FDCR) and quasi-electromechanical loop correlation ratio (QELCR). On this basis, the impact of different wind penetration levels and controller parameter settings on the participation of FCWG is investigated. It is revealed that if an FCWG oscillation mode (FOM) has a similar oscillation frequency to the system EOMs, there is a high possibility to induce strong interactions between FCWG dynamics and system electromechanical dynamics of the external power systems. In this circumstance, an interesting phenomenon may occur that an EOM may be dominated by FCWG dynamics, and hence is transformed into a quasi-EOM, which actively involves the participation of FCWG quasi-electromechanical state variables.
3

Zhang, Yaxing, e David P. Arnold. "Electromechanical devices with enhanced inductance via electrodynamic interactions". Sensors and Actuators A: Physical 180 (giugno 2012): 187–92. http://dx.doi.org/10.1016/j.sna.2012.04.002.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
4

Zhang, Hongye, Tianhui Yang, Wenxin Li, Ying Xin, Chao Li, Matteo F. Iacchetti, Alexander C. Smith e Markus Mueller. "Origin of the anomalous electromechanical interaction between a moving magnetic dipole and a closed superconducting loop". Superconductor Science and Technology 35, n. 4 (25 febbraio 2022): 045009. http://dx.doi.org/10.1088/1361-6668/ac53dc.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
Abstract Lenz’s law states that ‘the current induced in a circuit due to a change in a magnetic field is directed to oppose the change in flux and to exert a mechanical force which opposes the motion’. This statement has been widely adopted to predict many effects in electromagnetism. However, multiple recent experimental measurements have shown that the interactions between a moving permanent magnet (PM) and a closed superconducting loop can disobey the fundamental statement of Lenz’s law: during the entire process of a PM threading a high temperature superconducting (HTS) coil, the current induced in the HTS coil keeps the same direction, and thus the mechanical force exerted on the PM does not always oppose its movement. The seeming ‘Lenz’s law-violated phenomenon’, namely the anomalous electromechanical interaction between a moving PM and a closed superconducting loop, can bring about numerous potential applications in the domains of superconducting magnetic energy storage, electromagnetic ejection, and flux pumps, etc. However, the cause of this anomalous phenomenon remains controversial. By representing the PM as a magnetic dipole, taking the perfect conductor approximation for the closed superconducting loop, this paper has theoretically studied the anomalous electromechanical effect with rigorous mathematical formulae derivation. The proposed analytical equations have been verified by numerical modelling and experimental measurements, which further confirms the effectiveness of the perfect conductor approximation in ease of calculation. Results have shown that both the induced electromotive force and the intrinsic properties of the conductive loop (resistance-dominant or inductance-dominant) determine together the electromechanical performance of the studied energy conversion system, and the nearly zero resistivity of superconductors is the dominant cause of the anomalous phenomenon. This paper has illuminated the origin of the anomalous electromechanical interaction between a moving magnetic dipole and a closed superconducting loop, provided an efficient and reliable tool to predict the electromechanical performance of the studied energy conversion system, and is believed to deepen people’s understanding of the interactions between magnetic field sources and superconductors.
5

Mahboob, Imran, Hajime Okamoto e Hiroshi Yamaguchi. "An electromechanical Ising Hamiltonian". Science Advances 2, n. 6 (giugno 2016): e1600236. http://dx.doi.org/10.1126/sciadv.1600236.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
Solving intractable mathematical problems in simulators composed of atoms, ions, photons, or electrons has recently emerged as a subject of intense interest. We extend this concept to phonons that are localized in spectrally pure resonances in an electromechanical system that enables their interactions to be exquisitely fashioned via electrical means. We harness this platform to emulate the Ising Hamiltonian whose spin 1/2 particles are replicated by the phase bistable vibrations from the parametric resonances of multiple modes. The coupling between the mechanical spins is created by generating two-mode squeezed states, which impart correlations between modes that can imitate a random, ferromagnetic state or an antiferromagnetic state on demand. These results suggest that an electromechanical simulator could be built for the Ising Hamiltonian in a nontrivial configuration, namely, for a large number of spins with multiple degrees of coupling.
6

Erazo‐Damian, Inaki, Matteo F. Iacchetti e Judith M. Apsley. "Electromechanical interactions in a doubly fed induction generator drivetrain". IET Electric Power Applications 12, n. 8 (19 luglio 2018): 1192–99. http://dx.doi.org/10.1049/iet-epa.2017.0755.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
7

Lipiński, Krzysztof. "Multibody and Electromechanical Modelling in Dynamic Balancing of Mechanisms for Mechanical and Electromechanical Systems". Solid State Phenomena 147-149 (gennaio 2009): 339–44. http://dx.doi.org/10.4028/www.scientific.net/ssp.147-149.339.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
The paper focuses on dynamics of an electromechanical system composed of a DC motor and a planar four-bar mechanism. Minimization of mechanism/frame interactions is considered. Simultaneous elimination of frame shaking forces and torques is requested. The employed balancing method is counterweights allocation. Their parameters are found with a numerical modelling and a numerical optimization. They depend on shape of the mechanism’s velocity. Three alternative drives are tested in the paper: constant velocity drive; constant torque drive; and DC motor. The optimal counterweight’s parameters are derived for all these drives. Obtained results approved necessity of precise electromechanical modelling.
8

Callanan, J., C. L. Willey, V. W. Chen, J. Liu, M. Nouh e A. T. Juhl. "Uncovering low frequency band gaps in electrically resonant metamaterials through tuned dissipation and negative impedance conversion". Smart Materials and Structures 31, n. 1 (16 novembre 2021): 015002. http://dx.doi.org/10.1088/1361-665x/ac3434.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
Abstract A new class of electromechanically coupled metamaterial is presented which relies on magnetic field interactions between the host structure and a local resonator circuit to realize novel vibration control capabilities. The metamaterial chain exhibits a highly tunable vibration band gap which can be easily placed at a desired frequency using the resonant circuit parameters, providing a robust mechanism to independently alter the band gap width, depth, and frequency of maximum attenuation. In its dissipative form, the electromechanical metamaterial is shown to exhibit electrical metadamping as a function of the local resonance circuit resistance. The impact of the damping ratio as a function of the electrical resistance is characterized in frequency and time domains, and related to the infinite system dynamics. A robust experimental realization of the system is constructed which achieves electromechanical coupling through a moving coil and magnet system. The apparatus is used to show that the band gap location and depth can be readily tuned with the circuit elements. The presented metamaterial has potential for meaningful vibroacoustic practical applications in addition to revealing fundamentally new properties of damped electrically-resonant structures.
9

Topolov, Vitaly Yu, e A. V. Turik. "Electromechanical Interactions and Physical Properties of Perovskite-Type Ferroelectric Ceramics". Key Engineering Materials 132-136 (aprile 1997): 1044–47. http://dx.doi.org/10.4028/www.scientific.net/kem.132-136.1044.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
10

Ellingford, Christopher, Alan M. Wemyss, Runan Zhang, Ivan Prokes, Tom Pickford, Chris Bowen, Vincent A. Coveney e Chaoying Wan. "Understanding the enhancement and temperature-dependency of the self-healing and electromechanical properties of dielectric elastomers containing mixed pendant polar groups". Journal of Materials Chemistry C 8, n. 16 (2020): 5426–36. http://dx.doi.org/10.1039/d0tc00509f.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Più fonti
Ti possono interessare anche gli elenchi estesi di opere sul tema "Electromechanical interactions":
Articoli di riviste Libri

Tesi sul tema "Electromechanical interactions":

1

Mawassy, Nagham. "Modeling of electromechanical interactions in architected media in the framework of generalized continua". Electronic Thesis or Diss., Université de Lorraine, 2023. http://www.theses.fr/2023LORR0106.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
La thèse a pour objectif d’aborder de façon théorique et numérique l’homogénéisation de milieux architecturés et composites périodiques présentant un comportement multiphysique, dans le contexte des milieux continus généralisés. Le manuscrit est donc décomposé en deux parties qui couvrent explicitement ces questions. La première partie du manuscrit traite de l’homogénéisation des milieux périodiques et quasi-périodiques vers un continuum effectif à gradient de déformation. Une méthode d’homogénéisation discrète est appliquée pour les matériaux périodiques architecturés, conduisant à l’élaboration des propriétés effectives d’ordre supérieur sous forme d’expressions analytiques dépendant de la longueur du bord de la cellule unité. Le recours à une formulation à gradient de déformation permet de quantifier les effets de surface (les effets de bord en 2D) de matériaux architecturés. En outre, une homogénéisation quasi-périodique est développée à partir d’une expression volumétrique de l’énergie et en s’appuyant sur la notion de dérivée de forme pour déterminer les propriétés effectives quasi-périodiques basées sur le domaine périodique transformé. La deuxième partie du manuscrit intègre les des aspects multiphysiques dans les approches d’homogénéisation vers les continuums généralisés. La théorie de l’homogénéisation piézoélectrique et flexoélectrique est élaborée dans le contexte de l’homogénéisation périodique, en employant une formulation variationnelle en combinaison avec la condition de macro-homogénéité de Hill étendue. Ceci est suivie par des applications numériques pour l’homogénéisation des composites piézoélectriques et des matériaux architecturés ainsi que pour l’analyse de la propagation des ondes. En outre, l’homogénéisation vers le continuum effectif de Cosserat (micropolaire) est abordée pour les solides hétérogènes magnétoélastiques
The objective of the thesis is to address in a theoretical and numerical way the homogenization of periodic architected and composite media with multiphysical behavior, in the context of generalized continua. The manuscript is thus decomposed into two parts that explicitly cover these issues. The first part of the manuscript deals with the homogenization of periodic and quasi-periodic media towards a strain gradient effective continuum. A discrete homogenization method is applied for architected periodic materials, leading to the elaboration of higher order effective properties in the form of analytical expressions depending on the edge length of the unit cell. The use of a strain gradient formulation allows the quantification of the surface effects (edge effects in 2D) of architected materials. Moreover, a quasi-periodic homogenization is developed from a volumetric expression of the energy and relying on the notion of shape derivative to determine the quasi-periodic effective properties based on the periodic domain being transformed. The second part of the manuscript integrates multiphysical aspects in the homogenization approaches towards generalized continua. The theory of piezoelectric and flexoelectric homogenization is elaborated in the context of periodic homogenization, employing a variational formulation in combination with the extended Hill macro-homogeneity condition. This is followed by numerical applications for the homogenization of piezoelectric composites and architected materials as well as wave propagation analysis. Moreover, homogenization towards Cosserat (micropolar) effective continuum is addressed for the magnetoelastic heterogeneous solids
2

Bach, Tobias [Verfasser], Gerhard [Gutachter] Sextl, Andreas [Gutachter] Jossen e Klaus [Gutachter] Müller-Buschbaum. "Electromechanical interactions in lithium-ion batteries: Aging effects and analytical use / Tobias Bach ; Gutachter: Gerhard Sextl, Andreas Jossen, Klaus Müller-Buschbaum". Würzburg : Universität Würzburg, 2017. http://d-nb.info/1139978357/34.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
3

Passelergue, Jean-Christophe. "Interactions des dispositifs FACTS dans les grands réseaux électriques". Phd thesis, Grenoble INPG, 1998. http://www.theses.fr/1998INPG0148.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
L'augmentation des transits de puissance dans les réseaux d'énergie électrique ainsi que les contraintes environnementales ont conduit à l'introduction des dispositifs FACTS (Flexible AC Transmission Systems) pour l'amélioration de l'exploitation des réseaux. Ces dispositifs sont capables de remplir diverses fonctions comme le maintien de la tension, le contrôle des flux de puissance, l'amélioration de la stabilité du réseau, l'augmentation de la puissance transmissible maximale, etc. De plus, grâce à leur temps de réponse rapide, ils sont apparus comme des outils efficaces pour l'amortissement des oscillations électromécaniques très basses fréquences. Cette nouvelle fonction des dispositifs FACTS est d'autant plus importante que les réseaux mondiaux sont de plus en plus interconnectés, donc sensibles aux oscillations électromécaniques inter-régions. Cependant, le recours à de nombreux dispositifs FACTS dans un réseau nécessite d'étudier attentivement les éventuels problèmes d'interaction de régulation des dispositifs FACTS entre eux, mais aussi avec les autres éléments du réseau. Le travail réalisé dans le cadre de cette thèse traite des phénomènes dynamiques liés aux problèmes d'interaction résultant de l'insertion d'un ou plusieurs dispositifs FACTS shunt. Des indices de sensibilité et d'influence sont définis depuis les concepts de commandabilité et d'observabilité respectivement afin de prévoir l'importance des phénomènes d'interaction liés à l'insertion d'un dispositif FACTS et d'identifier les zones d'influence du dispositif FACTS. Ces indices sont appliqués à un réseau test 2 zones 4 machines et à un réseau réel simplifié 29 machines. Deux méthodes de coordination (méthode de type " minimax " et méthode linéaire quadratique décentralisée) sont mises en œuvre pour coordonner les dispositifs FACTS entre eux et avec les stabilisateurs de puissance (PSS - Power System Stabilizer) dans le réseau test 2 zones 4 machines
Power fiow increase and environmental constraints in power Systems hâve led to FACTS (Flexible AC Transmission Systems) devices insertion in order to improve the power System exploitation. Thèse devices are able to cany out some funétions such as the voltage support, the power transfer control and the increase of power transfer capability. Moreover, due to their fast response time, they are an efficient tool for damping low frequency oscillations. This new FACTS devices application is important as power Systems are more and more interconnected and thereby more sensitive to inter-area eîectromechanical oscillations. However, the recourse to several FACTS devices in a power System requires the careful study of the possible controller interaction phenomena between FACTS devices and with others system éléments. This thesis deals with the analysis and resolution of dynamic phenomena due to interaction problems resulting from the insertion of one or several shunt FACTS devices. Sensitivity and influence indices are defined from the controllability and observability notions, respectively, in order to preview the interaction phenomena importance due to a FACTS device insertions and to identify the influence areas of a FACTS device. Thèse indices are applied to a two-area four-machine test system and to a simplified real 29-machine power system. Two coordination methods (" minimax " method and decentralized linear quadratic method) are used to coordinate the FACTS devices themselves and a FACTS device and PSS (Power System Stabilizer) in the two-area four-machine test system
4

Zhao, Guangfeng. "ELECTROMECHANICAL INTERACTION ON THE DEFORMATION BEHAVIOR OF METALLIC MATERIALS". UKnowledge, 2013. http://uknowledge.uky.edu/cme_etds/19.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
Metallic materials play important roles in providing electrical, thermal, and mechanical functions in electronic devices and systems. The understanding of the electrical-thermal-mechanical interaction caused by the passage of electric current with high density is important to improve the performance and reliability of electronic assembly and packaging. The electromechanical interaction on the deformation behavior of copper and tin is studied in this work. The electromechanical response of Cu strips was studied by passing a DC electric current. The electric resistance linearly increased with time before the occurrence of electric fusing. The electrothermal interaction led to the buckling of the Cu strips with the maximum deflection increasing with the increase of the electric current density. The total strain was found to be proportional to the square of the electric current density. A power law relation was used to describe the dependence of the time-to-fusing on the electric current density. Using the nanoindentation technique, the effect of electric current on the indentation deformation of copper and tin was studied. The reduced contact modulus of copper and tin decreased with increasing the electric current density. With the passage of a DC electric current, the indentation hardness of copper increased slightly with increasing electric current density. With the passage of an AC electric current, the indentation hardness of copper decreased with increasing the indentation deformation. With the passage of a DC electric current, the indentation hardness of tin decreased with increasing the indentation load, showing the normal indentation size effect. Both the limit of infinite depth and the characteristic length were dependent on the electric current density. Using the tensile creep technique, the creep deformation of pure tin was studied with the passage of a DC electric current. The steady state creep rate increased with the increase in temperature, tensile stress and electrical current density. For the same tensile stress and the same chamber temperature, the steady state creep rate increased linearly with the square of the electric current density. The electric current density has no significant effect on the stress exponent and activation energy of the tensile creep of tin for the experimental conditions.
5

Abouderbala, Lagili Otman. "Electromechanical investigation of selected supramolecular hosts and their interaction with anions". Thesis, King's College London (University of London), 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.406600.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
6

Ahumada, Sanhueza Constanza. "Reduction of torsional vibrations due to electromechanical interaction in aircraft systems". Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/51653/.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
With the growth of electrical power onboard aircraft, the interaction between the electrical systems and the engine will become significant. Moreover, since the drivetrain has a flexible shaft, higher load connections can excite torsional vibrations on the aircraft drivetrain. These vibrations can break the shaft if the torque induced is higher than the designed value, or reduce its lifespan if the excitation is constant. To avoid these problems, the electromechanical interaction between the electrical power system and the drivetrain must be evaluated. Past studies have identified the electromechanical interaction and introduced experimental setups that allow its study. However, strategies to reduce the excitation of the torsional vibrations have not been presented. This thesis aims to analyse the electromechanical interaction in aircraft systems and develop an advanced electrical power management system (PMS) to mitigate its effects. The PMS introduces strategies based on the load timing requirements, which are built on the open loop Posicast compensator. The strategies referred as Single Level Multi-edge Switching Loads (SLME), Multilevel Loading (MLL), and Multi-load Single Level Multi-edge Switching Loads (MSLME) are applied to different loads, such as pulsating loads, ice protection system, and time-critical loads, such as the control surfaces. The Posicast based strategies, eliminate the torsional vibrations after a switching event, by the addition of zeros that cancel the poles of the system. For this reason, the knowledge of the natural frequencies of the mechanical system is necessary. Experimentally, the system parameters are obtained through Fourier analysis of the step response and the strategies are applied. A robust analysis of the strategies allows the establishment of the range of uncertainty on the frequencies that allow the proper operation of the strategies. Simulation and experimental results show that the torsional vibrations can be reduced to values close to zero by the application of the strategy. Therefore, the PMS mitigates the electromechanical interaction between the electrical power system and the aircraft drivetrain.
7

Cascio, Michele. "Coupled Molecular Dynamics and Finite Element Methods for the simulation of interacting particles and fields". Doctoral thesis, Università di Catania, 2019. http://hdl.handle.net/10761/4120.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
The dynamical simulation of many particle systems is currently a widespread technique in many fields: e.g. nuclear and atomic physics, computational material science, computational chemistry, molecular biology and pharmacology. Under the locution Molecular Dynamics (MD) we can regroup a variety of approaches and numerical codes, whereas the commonalities are: 1) the atomistic (or nuclear) resolution (i.e. particles are atoms or nucleons), 2) the force derivation, starting from the systems configuration, through semi-classical (also called semi-empirical) or quantum mechanics based theoretical frameworks, 3) the (generally explicit) numerical integration of the Newton-like equations of the motions to simulate the system kinetics. Within this scheme methodology variations can be found in the literature, but it is undoubtedly valid to qualify the MD meaning in the field of the scientific computation. The general scope of this Thesis work is the extension of the MD methods to the study of kinetics of larger particle (i.e. from mesoscopic dimensions and above), where effective particle-particle interactions are mediated by a field evolving self-consistently with the many particles system. This objective is mainly motivated by the applications of the method to control and predict the manipulation of mesoscopic (electrically) neutral particles by means of electromagnetic (e.m.) interactions: i.e. exploiting the so called dielectrophoresis (DEP) phenomena in the systems of electromechanical particles (EMPs). This is the specific case of study here considered, but in principle the methodology can applied after suitable adaptation to also other systems.
8

Feehally, Thomas. "Electro-mechanical interaction in gas turbine-generator systems for more-electric aircraft". Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/electromechanical-interaction-in-gas-turbinegenerator-systems-for-moreelectric-aircraft(64606031-8744-4925-a8e1-3bf4ea108696).html.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
Modern 'more-electric' aircraft demand increased levels of electrical power as non-propulsive power systems are replaced with electrical equivalents. This electrical power is provided by electrical generators, driven via a mechanical transmission system, from a rotating spool in the gas turbine core. A wide range of electrical loads exist throughout the aircraft, which may be pulsating and high powered, and this electrical power demand is transferred though the generators to produce a torque load on the drivetrain. The mechanical components of the drivetrain are designed for minimum mass and so are susceptible to fatigue, therefore the electrical loading existing on modern airframes may induce fatigue in key mechanical components and excite system resonances in both mechanical and electrical domains. This electro-mechanical interaction could lead to a reduced lifespan for mechanical components and electrical network instability.This project investigates electro-mechanical interaction in the electrical power offtake from large diameter aero gas turbines. High fidelity modelling of the drivetrain, and generator, allow the prediction of system resonances for a generic gas turbine-generator system. A Doubly-Fed Induction Generator (DFIG) is considered and modelled. DFIGs offer opportunities due to their fast dynamics and their ability to decouple electrical and mechanical frequencies (e.g. enabling a constant frequency electrical system with a variable speed mechanical drive). A test platform is produced which is representative of a large diameter gas turbine and reproduces the electro-mechanical system behaviour. The test platform is scaled with respect to speed and power but maintains realistic sizing between component dimensions which include: a gas turbine mechanical spool emulation, transmission driveshafts and gearbox, and accessory loads such as a generator. This test platform is used to validate theoretical understanding and suggest alternative mechanical configurations, and generator control schemes, for the mitigation of electro-mechanical interaction.The novel use of a DFIG and an understanding of electro-mechanical interaction allow future aircraft designs to benefit from the increased electrification of systems by ensuring that sufficient electrical power can be provided by a robust gas turbine-generator system.
9

GIRARDELLO, DETONI JOAQUIM. "Developments on Electrodynamic Levitation of Rotors". Doctoral thesis, Politecnico di Torino, 2012. http://hdl.handle.net/11583/2497116.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
Magnetic bearings are systems capable of supporting rotors in absence of mechanical contact. Among many advantages with respect to ball and roller bearings are the possibilities of operating at extremely high rotational speeds and free of maintenance. Nevertheless, classical active magnetic bearings (AMB) are costly systems and may suffer from reliability problems. The most common types of passive magnetic bearings (PMB) based on the use of permanent magnet and reluctance forces are robust and relatively cheap but are affected by an intrinsic stability problem related to negative stiffness. The alternative of superconducting bearings has to deal with the difficulties for guaranteeing low temperatures for the superconducting materials to work; this represents a barrier for this technology. In the last decades an alternative for obtaining stable passive magnetic levitation has been searched, leading to the development of electrodynamic bearings. These systems, capable of realizing electrodynamic suspension for rotors using regular materials at room temperature, may be an alternative for the suspension of high rotational speed machines in the near future. The technological solutions proposed are still unable of devising a system capable of demonstrating the feasibility of this concept. Introduced in this context, this doctoral dissertation aims at developing models and design procedures to bring electrodynamic levitation of rotors closer to industrial applications. To this end, a large portion of the work is devoted to develop a unified model for representing the electromechanical interaction between rotor and stator generated by electrodynamic bearings of different types, namely homopolar and heteropolar configurations. The electromechanical model is developed taking advantage of the complex coordinate representation, typical in rotordynamics, in order to enable easy integration of the bearing's model with different rotordynamic models. An experimental validation of the model is carried out for homopolar configurations. The study of the dynamics of rotors on electrodynamic bearings is probably one of the most important aspects that must be dealt with before the bearings can reach the technological development needed to become industrially available. Bearing this in mind, the dynamics of a Jeffcott rotor and that of a four degree of freedom rotor are studied devoting special attention to the study of stability demonstrating the presence of unstable cylindrical and conical modes. The unbalance and frequency responses of the rotor on electrodynamic bearings are used to evidence the advantages and drawbacks between homopolar and heteropolar configurations. The studies are conduced using the state space formalism to obtain easy to manipulate system models. The modelling of the suspension evidences the strong coupling between the subsystems, showing that the influence of each subsystem on the rotordynamic stability is not obvious, thus complicating the design of the whole suspension. Considering an iterative design approach, the design of a test rig is presented. It is designed to test the validity of the models and the feasibility of radial electrodynamic suspension. A the mechanical layout of the test rig is developed to deal with the stability aspects introduced by the use of electrodynamic bearings.
10

Berggren, Peter. "Elastic and inelastic scattering effects in conductance measurements at the nanoscale : A theoretical treatise". Doctoral thesis, Uppsala universitet, Institutionen för fysik och astronomi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-261609.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
Elastic and inelastic interactions are studied in tunnel junctions of a superconducting nanoelectromechanical setup and in response to resent experimental superconducting scanning tunneling microscope findings on a paramagnetic molecule. In addition, the electron density of molecular graphene is modeled by a scattering theory approach in very good agreement with experiment. All studies where conducted through the use of model Hamiltonians and a Green function formalism. The nanoelectromechanical system comprise two fixed superconducting leads in-between which a cantilever suspended superconducting island oscillates in an asymmetric fashion with respect to both fixed leads. The Josephson current is found to modulate the island motion which in turn affects the current, such that parameter regions of periodic, quasi periodic and chaotic behavior arise. Our modeled STM setup reproduces the experimentally obtained spin excitations of the paramagnetic molecule and we show a probable cause for the increased uniaxial anisotropy observed when closing the gap distance of tip and substrate. A wider parameter space is also investigated including effects of external magnetic fields, temperature and transverse anisotropy. Molecular graphene turns out to be well described by our adopted scattering theory, producing results that are in good agreement with experiment. Several point like scattering centers are therefore well suited to describe a continuously decaying potential and effects of impurities are easily calculated.

Libri sul tema "Electromechanical interactions":

1

1944-, Maugin G. A., a cura di. Nonlinear electromechanical couplings. Chichester, West Sussex, England: New York, 1992.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
2

Matsch, Leander W. Electromagnetic and electromechanical machines. 3a ed. New York: Harper & Row, 1986.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
3

Matsch, Leander W. Electromagnetic and electromechanical machines. 3a ed. New York: Wiley, 1986.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
4

Gladwell, G. M. L., J. M. Huyghe, Peter A. C. Raats e Stephen C. Cowin, a cura di. IUTAM Symposium on Physicochemical and Electromechanical Interactions in Porous Media. Dordrecht: Springer Netherlands, 2005. http://dx.doi.org/10.1007/1-4020-3865-8.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
5

Lenk, Arno. Electromechanical Systems in Microtechnology and Mechatronics: Electrical, Mechanical and Acoustic Networks, their Interactions and Applications. Berlin, Heidelberg: Springer-Verlag Berlin Heidelberg, 2011.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
6

Jackson, John David. Classical electrodynamics. 3a ed. New York: Wiley, 1999.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
7

Jackson, John David. Électrodynamique classique: Cours et exercices d'électromagnétisme. Paris: Dunod, 2001.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
8

Holopainen, Timo. Electromechanical interaction in rotordynamics of cage induction motors. Espoo [Finland]: VTT Technical Research Centre of Finland, 2004.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
9

Sankarian, Gowrinathan, e Society of Photo-optical Instrumentation Engineers., a cura di. Electromechanical system interaction with optical design: 21-22 May 1987, Orlando, Florida. Bellingham, Wash., USA: SPIE, 1987.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
10

Matsch, Leander W., e J. Derald Morgan. Electromagnetic and Electromechanical Machines. Wiley & Sons, Incorporated, John, 1986.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Più fonti

Capitoli di libri sul tema "Electromechanical interactions":

1

Lenk, Arno, Rüdiger G. Ballas, Roland Werthschützky e Günther Pfeifer. "Electromechanical Interactions". In Microtechnology and MEMS, 229–46. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-10806-8_7.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
2

Lenk, Arno, Rüdiger G. Ballas, Roland Werthschützky e Günther Pfeifer. "Electromechanical Networks and Interactions". In Microtechnology and MEMS, 15–58. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-10806-8_2.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
3

Asanbayev, Valentin. "Electromechanical Interactions in Asynchronous Machines: Basic Physical Phenomena". In Asynchronous Machines, 15–29. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-92284-9_2.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
4

Ruiz-Baier, Ricardo, Davide Ambrosi, Simone Pezzuto, Simone Rossi e Alfio Quarteroni. "Activation Models for the Numerical Simulation of Cardiac Electromechanical Interactions". In Computer Models in Biomechanics, 189–201. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-5464-5_14.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
5

van Meerveld, Jan, e Markus Hütter. "About the Proper Choice of Variables to Describe Flow-Induced Crystallization in Polymer Melts". In IUTAM Symposium on Physicochemical and Electromechanical Interactions in Porous Media, 315–20. Dordrecht: Springer Netherlands, 2005. http://dx.doi.org/10.1007/1-4020-3865-8_36.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
6

Lemarchand, Eric, Luc Dormieux e Franz-Josef Ulm. "A Micromechanics Approach to the Mechanically-Induced Dissolution in Porous Media". In IUTAM Symposium on Physicochemical and Electromechanical Interactions in Porous Media, 321–27. Dordrecht: Springer Netherlands, 2005. http://dx.doi.org/10.1007/1-4020-3865-8_37.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
7

van Duijn, C. J., e I. Sorin Pop. "A Microscopic Description of Crystal Dissolution and Precipitation". In IUTAM Symposium on Physicochemical and Electromechanical Interactions in Porous Media, 343–48. Dordrecht: Springer Netherlands, 2005. http://dx.doi.org/10.1007/1-4020-3865-8_40.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
8

Ricken, Tim, e Reint de Boer. "Two Phase Flow in Capillary Porous Thermo-Elastic Materials". In IUTAM Symposium on Physicochemical and Electromechanical Interactions in Porous Media, 359–64. Dordrecht: Springer Netherlands, 2005. http://dx.doi.org/10.1007/1-4020-3865-8_42.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
9

Konowrocki, Robert, e Tomasz Szolc. "An Analysis of Electromechanical Interactions in the Railway Vehicle Traction Drive Systems Driven by AC Motors". In Advances in Intelligent Systems and Computing, 225–35. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-27687-4_23.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
10

Filippov, D. A., M. I. Bichurin, V. M. Petrov, V. M. Laletin, N. N. Paddubnaya e G. Srinivasan. "Electromechanical Resonance in Multilayer and Bulk Magnetoelectric Composites". In Magnetoelectric Interaction Phenomena in Crystals, 71–80. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-2707-9_5.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri

Atti di convegni sul tema "Electromechanical interactions":

1

Sobczyk, Tadeusz J., e Michal Walas. "An algorithm determining stationary electromechanical interactions in faulty AC machines". In 2015 IEEE 10th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives (SDEMPED). IEEE, 2015. http://dx.doi.org/10.1109/demped.2015.7303673.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
2

Sinitskiy, Rodion E., Dmitriy I. Ostertak e Valery P. Dragunov. "Features of Electromechanical Interactions in MEMS with a Solid-State Energy Source". In 2021 XV International Scientific-Technical Conference on Actual Problems Of Electronic Instrument Engineering (APEIE). IEEE, 2021. http://dx.doi.org/10.1109/apeie52976.2021.9647456.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
3

Park, Youn, e Andreas Schlaich. "Dynamic Interactions in an Electromechanical Main Gearbox of a High-Speed Coaxial Compound Helicopter". In Vertical Flight Society 75th Annual Forum & Technology Display. The Vertical Flight Society, 2019. http://dx.doi.org/10.4050/f-0075-2019-14670.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
To further increase the speed of conventional helicopters, several new concepts and technology demonstrators have been developed. This paper proposes an electromechanical main gearbox for a compound, coaxial helicopter. The speed and power variation of the main rotor between hover and high-speed cruise is realised by two brushless permanent magnet (BPM) machines and a differential planetary gear set that act as a continuously variable transmission (CVT). To assess such highly integrated hybrid applications, a novel analysis method is proposed that captures the influences of electrical motor and gear excitations in a full system approach. Alternative gear and motor designs are explored by completing speed sweeps through different operating conditions in the frequency domain. System responses are shown and indicate that motor and gear excitations can interact if their parameters are not selected carefully. This can lead to critical situations when hitting resonances and demonstrates the importance of considering electromechanical interactions from early design stages.
4

Landis, Chad M. "Phase Field Modeling of Ferroelectric Domain Wall Interactions With Charge Defects". In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-16184.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
The overall objective of this work is to develop a theoretical model that can track the evolution of the domain structures in ferroelectric crystals, which are responsible for the non-linear electromechanical behavior of these materials. To this end, a continuum thermodynamics framework is devised, and the theory falls into the class of phase-field or diffuse-interface modeling approaches. Here a set of micro-forces and governing balance laws are postulated and applied within the second law of thermodynamics to identify the appropriate material constitutive relationships. The approach is shown to yield the commonly accepted Ginzburg-Landau equation for the evolution of the polarization order parameter. Within the theory a form for the free energy is postulated that can be applied to fit the general elastic, piezoelectric and dielectric properties of a ferroelectric material near its spontaneously polarized state. Thereafter, a principle of virtual work is specified for the theory and is implemented to devise a finite element formulation. The theory and numerical methods are used to investigate the interactions of 180° and 90° domain walls with an array of charge defects and to determine the electromechanical pinning strength of the array on the walls.
5

Ran, Li, Dawei Xiang e James L. Kirtley Jr. "Analysis of Electromechanical Interactions in a Flywheel System with a Doubly Fed Induction Machine". In 2010 IEEE Industry Applications Society Annual Meeting. IEEE, 2010. http://dx.doi.org/10.1109/ias.2010.5615696.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
6

Tulicki, J., T. J. Sobczyk e M. Sulowicz. "Simplified Methodology for Analysis of Electromechanical Interactions in AC Machines at Steady-State Performances". In 2021 IEEE 13th International Symposium on Diagnostics for Electrical Machines, Power Electronics and Drives (SDEMPED). IEEE, 2021. http://dx.doi.org/10.1109/sdemped51010.2021.9605528.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
7

Mitura, A. "Investigation of electromechanical coupling characteristics of a double magnet system". In Experimental Mechanics. Materials Research Forum LLC, 2023. http://dx.doi.org/10.21741/9781644902578-8.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
Abstract. In this work, the experimental results of the electromechanical coupling coefficient identification are presented. The research covers two cases: test with a single magnet (I) and test with a double magnet, where two repelling magnets in one structure are connected (II). In case (I), the analytical description of the electromechanical coupling coefficient was determined. Whereas the analysis of case (II) confirms the superposition principle for interactions between both magnets and a single inductive coil. Finally, the presented analysis proposes some premises which will be used in the future to develop the model with two levitating magnets.
8

Sinha, Rajarishi, Christiaan J. J. Paredis e Pradeep K. Khosla. "Interaction Modeling in Systems Design". In ASME 2001 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/detc2001/cie-21285.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
Abstract We present a simulation and design framework for simultaneously designing and modeling electromechanical systems. By instantiating component objects in our software and connecting them to each other via ports, the designer configures complex systems. Interactions are the physical phenomena that occur at the interfaces between connected components. Most of the research in configuration design has focused on modeling components, with very little attention paid to the dynamics of the interaction phenomena. To obtain an accurate virtual prototype, the interaction dynamics must also be captured in behavioral models. All interactions between components are mediated by ports. We introduce port and interaction model taxonomies, and provide a set-theoretic formalism that defines the algebra of port and interaction models. In addition, the formalism supports automatic instantiation of interaction models given the types of the connected ports, as well as the ability to replace one interaction model for another depending on the requirements of the desired simulation experiment. We illustrate our framework with an example.
9

Davidson, Jacob D., e N. C. Goulbourne. "Electromechanical Coupling in Ionic Polymer-Metal Composites". In ASME 2010 International Mechanical Engineering Congress and Exposition. ASMEDC, 2010. http://dx.doi.org/10.1115/imece2010-39582.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
Ionic polymer-metal composites (IPMCs) are smart materials which function as soft sensors and actuators. When a small DC voltage (1–5 V) is applied to an IPMC in a cantilever configuration, ion and solvent transport through the thickness of the polymer membrane causes the transducer to bend towards the anode. For device development and use in engineering applications, actuation is often described at a higher level in terms of an electromechanical coupling between the ionic charge distribution and the stresses developed in the IPMC. In this work we derive a set of relationships describing the coupling response by starting with basic considerations of polymer microstructure and local interactions during actuation. A micromechanical modeling framework is employed in order to account for the material microstructure. Using a generalized expression for electrostatic cluster pressure which takes into account clusters recombining to form larger cluster upon expansion, we define an effective local stiffness which varies with both solvent uptake and charge density in the boundary layers. An equilibrium relationship between solvent uptake and charge density is determined by considering the free energy of the homogenized polymer as the sum of elastic, electrostatic, and chemical components. Stress developed in the boundary layers is then calculated from changes in local stiffness and solvent uptake with respect to charge density. The resulting relationship for electromechanical coupling is found to be in good agreement with previous empirical models, thus serving as a model validation and demonstrating why certain forms for electromechanical coupling can be used to explain a variety of experimental observations. Specifically, we see that stress developed in the boundary layers is well described as a quadratic polynomial in charge density due to the form of the electrostatic cluster pressures.
10

Campbell, Matthew I., e Advait Limaye. "New Advances in the Functional Modeling of Electro-Mechanical Components". In ASME 2002 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/detc2002/dtm-34007.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Abstract (sommario):
This paper presents some key extensions to a representation for electromechanical components that is sufficiently detailed enough to provide for the automated construction of new design configurations. The extensions, shown here, build upon a representation that is both formal and implemented, and can handle the interactions between components even if such interactions represent only partial configurations. The results of these new additions elucidate the power and flexibility of this functional representation for electromechanical components. The method can be used as an interactive tool to allow an engineering designer to explore new design concepts or can be combined with additional software tools to achieve a computational design synthesis approach to topological design problems. The inclusion of function sharing, component layout, and qualitative dynamics achieve a closer approach to how the human mind represents components.

Vai alla bibliografia