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Dissertations / Theses on the topic 'Dynamics of rotating machines'

Author: Grafiati

Published: 31 May 2025

Last updated: 31 July 2025

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1

Lee, Sun Ung. "Dynamics of high-speed rotating machines." Thesis, Imperial College London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326078.

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2

PEDREIRA, JAVA ATAYDE. "DYNAMICS OF ROTATING MACHINERY IN FLUID-FILM BEARING." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2006. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=9966@1.

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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO<br>Este trabalho analisa a influência dos mancais hidrodinâmicos no comportamento rotodinâmico das turbomáquinas, no que diz respeito na resposta ao desbalanceamento, modos de vibrar e, principalmente, a instabilidade, que tende a manifestar-se em rotações elevadas ou baixas cargas. As propriedades de rigidez e amortecimento do mancal são determinadas a partir da solução analítica da Equação de Reynolds, usando a aproximação do mancal curto. Um procedimento é apresentado para modelagem dinâmica do sistema rotor-mancal. O modelo de e

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3

Elnady, Maged Elsaid. "On-shaft vibration measurement using a MEMS accelerometer for faults diagnosis in rotating machines." Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/onshaft-vibration-measurement-using-a-mems-accelerometer-for-faults-diagnosis-in-rotating-machines(cf9b9848-972d-49ff-a6b0-97bef1ad0e93).html.

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The healthy condition of a rotating machine leads to safe and cheap operation of almost all industrial facilities and mechanical systems. To achieve such a goal, vibration-based condition monitoring has proved to be a well-accepted technique that detects incipient fault symptoms. The conventional way of On-Bearing Vibration Measurement (OBVM) captures symptoms of different faults, however, it requires a relatively expensive setup, an additional space for the auxiliary devices and cabling in addition to an experienced analyst. On-Shaft Vibration Measurement (OSVM) is an emerging method proposed

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4

Barsoum, Nader N. "Analysis and computation of instability mechanisms in rotating electrical machinery." Thesis, University of Newcastle Upon Tyne, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328149.

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5

Melo, Brandao De Raissa. "Surveillance de l’apparition de fissures sur des composants structuraux de machines." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEI073.

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Le principe de la maintenance conditionnelle consiste à évaluer en permanence l’intégrité des machines industrielles, à partir des mesures et de traitements du signal appropriés, afin d’intervenir uniquement au moment le plus opportun. Dans ce contexte, l’objectif de cette thèse est de développer une technique de détection, aussi précoce que possible, de l’amorce de dégradation lente d’une structure vibrante, telle que les fissures de fatigue, pour éviter toute défaillance inattendue des machines. Notre approche se base sur les données mesurées à l’aide de deux moyens expérimentaux mis en œuvr

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6

Matija, Igli. "Design of a fluid inerter for the control of rotor vibrations." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/12235/.

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Nel 2008, due articoli della rivista sportiva “Autosport” rivelarano dettagli di una nuova sospensione meccanica nota con il nome di "J-damper" che era entrata in Formula 1 e che aveva offerto in termini di prestazioni significativi aumenti di maneggevolezza e aderenza. Si trattava di un "inerter", la cui origine sta nel lavoro accademico su circuiti meccanici ed elettrici realizzati dal prof. M. C. Smith. Gli Inerter sono particolari dispositivi meccanici con la proprietà che la forza applicata ai punti fissi, detti terminali, è direttamente proporzionale all'accelerazione. Tale dispositivo h

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7

Xu, Wubin. "The effect of manufacturing tolerances on the steady state and dynamic performance of rotating machines supported by journal bearings." Thesis, Staffordshire University, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.522386.

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8

Kanth, Ratnakar M. "A personal computer based instrumentation system for determining real-time dynamic torque in rotating machinery." Thesis, Virginia Tech, 1987. http://hdl.handle.net/10919/45823.

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<p>Measurement of dynamic/transient torques is important in the dynamic analysis of rotating machinery as it provides insight into the internal state of the machine. Existing methods are difficult to implement, results are not obtained in real-time and are not very accurate.</p> <p> This thesis introduces a new method of determining real-time dynamic torque. An optical encoder is used to sense motion at a convenient point in the rotating system containing the rigid shaft of interest. The encoderâ s output is processed digitally to yield angular velocity, acceleration and dynamic torque

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9

De, Gaudemaris Vincent. "Development of low-to mid-fidelity models for the analysis of whirl flutter in rigid or flexible blade propellers." Electronic Thesis or Diss., Ecully, Ecole centrale de Lyon, 2025. http://www.theses.fr/2025ECDL0002.

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Alors que les avions de nouvelle génération tendent à intégrer des moteurs de plus grand diamètre sur des ailes d’allongement croissant, des préoccupations émergent concernant l'impact de ces évolutions sur le flottement gyroscopique. Cette instabilité aéroélastique, pouvant affecter les avions à hélice classiques comme des configurations plus complexes équipées d'open rotors, se manifeste par un mouvement de précession divergent de l'axe de rotation du moteur. Il est donc essentiel de s'intéresser à ce phénomène pour garantir la sécurité et la fiabilité des prochaines générations d'avions.Les

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10

Balmaseda, Aguirre Mikel. "Reduced order models for nonlinear dynamic analysis of rotating structures : Application to turbomachinery blades." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSEI067.

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In the present work reduced order models (ROM) that are independent from the full order finite element models (FOM) considering geometrical non linearities are developed and applied to the dynamic study of rotating structures. The structure is considered to present nonlinear vibrations around the pre-stressed equilibrium induced by rotation enhancing the classical linearised approach. The reduced nonlinear forces are represented by a polynomial expansion obtained by the Stiffness. Evaluation Procedure (STEP) and then corrected by means of an original procedure by means of a Proper Orthogonal D

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11

Xie, Lihan. "Suivi numérique des bifurcations pour l'analyse paramétrique de la dynamique non-linéaire des rotors." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEI018/document.

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Au cœur des moyens de transport, de transformation d'énergie, et de biens d'équipements, les machines tournantes peuvent avoir des comportements dynamiques complexes dus à de multiples sources de non linéarités liées aux paliers hydrodynamiques, à la présence de fissures, aux touches rotor-stator, ... Des phénomènes comme les décalages fréquentiels et donc de vitesses critiques, les cycles d'hystérésis avec sauts d'amplitudes, le changement brutal du contenu fréquentiel des réponses, sont des expressions de ces comportements. Résoudre les équations du mouvement induites par des modélisations a

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12

Ghanem, Assaf. "Contributions à la modélisation avancée des machines tournantes en dynamique transitoire dans le cadre Arlequin." Thesis, Lyon, INSA, 2013. http://www.theses.fr/2013ISAL0006.

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Les machines tournantes sont le siège de phénomènes vibratoires particuliers liés à des sources d’excitation variées dues à l’effet de rotation, au couplage vibrations/mouvements de rotation/écoulements tournants, à la symétrie périodique ou quasi-périodique des structures, et à l’amortissement interne et externe. Les travaux de recherche présentés dans ce mémoire portent sur le développement d’une méthodologie de couplage de modèles 1D poutre et 3D pour l’analyse dynamique avancée des machines tournantes. La méthode Arlequin est une méthode de raccord de modèles autorisant par l’intermédiaire

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13

Kohut, Vojtěch. "Stanovení tuhosti, tlumení a přídavné hmotnosti tenké kapalinové vrstvy v těsnící spáře." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230203.

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The main purpose of this master’s thesis is to propose the methodology suitable for experimental evaluation of additional mass, stiffness and damping by which a liquid layer in the sealing gap affects the rotor. Sealing gaps are important structural elements of hydrodynamic machines. An appropriate design of a sealing gap including the additional effects determination is an inevitable part of the machine overall dynamic design. The thesis also provides a literature search in the field of rotor dynamics and additional effects of a liquid. The designed experiment aiming to determine additional e

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14

Houlston, Paul Robert. "Active vibration control of rotating machines." Thesis, University of Nottingham, 2007. http://eprints.nottingham.ac.uk/10275/.

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Second order matrix equations arise in the description of real dynamical systems. Traditional modal control approaches utilise the eigenvectors of the undamped system to diagonalise the system matrices. Any remaining off-diagonal terms in the modal damping matrix are discarded. A regrettable automatic consequence of this action is the destruction of any notion of the skew-symmetry in the damping. The methods presented in this thesis use the `Lancaster Augmented Matrices' (LAMs) allowing state space representations of the second order systems. `Structure preserving transformations' (SPTs) are u

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15

Mahdi, Hassan Hamoodi. "Vibrational modal analysis of rotating machines." Thesis, University of Hertfordshire, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303391.

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16

NICCOLINI, MARMONT DU HAUT CHAMP CARLO ALBERTO. ""Analysis of dynamic responses and instabilities in rotating machinery”." Doctoral thesis, Università degli studi di Genova, 2022. http://hdl.handle.net/11567/1080576.

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The first task of the present research is to characterize both experimentally and numerically journal bearings with low radial clearances for rotors in small-scale applications (e.g., micro Gas Turbines); their diameter is in the order of ten millimetres, leading to very small dimensional clearances when the typical relative ones (order of 1/1000) are employed; investigating this particular class of journal bearings under static and dynamic loading conditions represents something unexplored. To this goal, a suitable test rig was designed, and the performance of its bearings were investigated u

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17

Gubran, Ahmed. "Vibration diagnosis of blades of rotating machines." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/vibration-diagnosis-of-blades-of-rotating-machines(40f1d466-b393-42f6-a65a-e16801f06920).html.

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Rotating blades are considered to be the one of the most common cause of failures in rotating machinery. Blade failure modes normally occur as a result of cracks due to unexpected operating conditions, which are normally caused by accidents of foreign objects damage, high cycle fatigue, blade rubbing, blade root looseness, and degradation from erosion and corrosion. Thus, detection of blade faults has an important role in reducing blade related failures and allowing repairs to be scheduled for the machinery. This in turn will lead to reduction in maintenance costs and thus raise productivity a

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18

Storozhev, Dmitry Leonidovich. "Smart Rotating Machines for Structural Health Monitoring." Cleveland State University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=csu1262724991.

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19

Maynard, Matthew. "Permanent magnet machines in magnetic bearings." Thesis, University of Sussex, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288787.

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In rotating machinery there exist mechanical and electrical losses. With the advent of more efficient power-electronic devices, the shift has been towards reducing mechanical losses. There are solutions that exist, such as air bearings and oil-mist bearings that go some way to reducing these losses. In order to produce an even more efficient machine, windage losses must be reduced. This can be achieved by placing the machine in a vacuum. It becomes clear, therefore, that the bearing system can only be of the magnetic type. An area of research interest that has developed as a result of higher-e

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20

Kitsos, Christos. "Predicting malfunction in quasi steady state rotating machines." Thesis, University of Leicester, 2007. http://hdl.handle.net/2381/30244.

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Dry vacuum pumps appeared in the mid-1980s in order to address problems caused by conventional fluid-sealed pumps. However, their working environment is often harsh, sometimes resulting in catastrophic faults. Continuously monitoring the state of the system and scheduling maintenance as appropriate is thus desirable.;Sliding mode techniques have been widely used in condition monitoring and fault detection schemes in recent years. Their main advantage is a fundamental robustness against certain kinds of parameter variations. They also enable faults and/or values of un-measurable system paramete

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21

Husain, Tausif. "Rotating Reference Frame Control of Switched Reluctance Machines." University of Akron / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=akron1375286539.

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22

Abboud, Rita. "Méthode de mesure sans contact de la température intégrée au rotor d’une machine électrique tournante au moyen d’une fibre optique à réseaux de Bragg." Thesis, Compiègne, 2021. http://www.theses.fr/2021COMP2645.

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Dans le domaine des systèmes de transport, des problèmes de chauffage apparaissent avec l'augmentation de la température dans différents types de machines électriques. Dans la conception classique des machines électriques, l'analyse thermique doit être prise en compte dans la conception initiale, le contrôle et la surveillance des machines électriques. La mesure de la température locale, en particulier dans le rotor, est importante pour plusieurs raisons telles que l'extension de la durée de vie des composants de la machine électrique et la localisation des points chauds à l'intérieur de la ma

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23

Dakel, Zaki. "Stabilité et dynamique non linéaire de rotors embarqués." Thesis, Lyon, INSA, 2014. http://www.theses.fr/2014ISAL0087/document.

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Les rotors sont excités non seulement par le balourd tournant mais aussi par les différents mouvements de leur support : turbocompresseurs de véhicules, turbomoteurs aéronautiques, pompes à vide portées en sont des exemples industriels. Ainsi la conception de rotors robustes capables de bien fonctionner sous de telles conditions (excitations extrêmes) est nécessaire pour éviter des instabilités, source de défaillance catastrophique. Le présent travail a pour objectif de prévoir le comportement dynamique d’un rotor embarqué monté sur des paliers rigides ou élastiques hydrodynamiques et soumis à

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24

Lim, Sing-Yong. "Particle dynamics in rotating cylinders." Thesis, University of Cambridge, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.619608.

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25

Roach, M. P. "Vibration control in rotating machinery using variable dynamic stiffness hydrostatic squeeze-films." Thesis, Staffordshire University, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.254234.

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26

Obaid, Ramzy R. "Detection of rotating mechanical asymmetries in small induction machines." Diss., Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/13527.

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27

Alkhfaji, Saad Sami. "Vibration control of rotating machines using actuated bearing seatings." Thesis, University of Nottingham, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.581985.

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This thesis addresses the problem of controlling the vibration of rotating machines using active bearing seatings. Contributions have been in seven areas: test rig development, rotating machinery modelling, developing appropriate control laws, updating method for piezoelectric actuators, determining specifications for the actuators from FE models, modal correlation methods (with and without frequency weighting) and modal expansion. A rotating machine test rig has been designed and constructed. In this rig, an active bearing seating has been designed to accommodate two actuators, located orthog

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28

Yeh, Ting-Jen. "Modeling, analysis and control of magnetically levitated rotating machines." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/11214.

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29

Yao, Yanmei. "Study of Induction Machines with Rotating Power Electronic Converter." Doctoral thesis, KTH, Elkraftteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-196054.

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This thesis investigates a novel induction machine topology that uses a rotating power electronic converter. Steady-state and dynamic performance of the topology is studied to understand its operational principle. Furthermore the potential of improving its efficiency and power factor is investigated. The topology is referred to as wound rotor induction machine with rotating power electronic converter (WRIM-RPEC). The WRIM-RPEC topology offers the possibility to magnetize the induction machine from the rotor side by introducing a reactive voltage in the rotor. Thus, the power factor of the

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30

Blaschke, Peter Gerhard. "Vibro-acoustic design tool for noise optimization of rotating machines." Thesis, Imperial College London, 1996. http://hdl.handle.net/10044/1/7355.

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31

Chauvicourt, Fabien. "Vibro-acoustics of rotating electric machines: Prediction, Validation and Solution." Doctoral thesis, Universite Libre de Bruxelles, 2018. https://dipot.ulb.ac.be/dspace/bitstream/2013/271049/4/thesis.pdf.

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The increase of greenhouse gas emission is commonly accepted to largely contribute to global warming, in part due to the massive use of non-renewable fossil energy sources. It is a reason why recently, beside other industrial sectors, electric mobility has been considered as the next generation for transportation systems. But the electrification of a vehicle introduces new challenges in its design since it involves different domains of expertise than the ones from Internal Combustion Engine (ICE) vehicles. In particular, Noise, Vibration and Harshness (NVH) comfort is significantly affected by

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32

Abboud, Dany. "Vibration-based condition monitoring of rotating machines in nonstationary regime." Thesis, Lyon, INSA, 2015. http://www.theses.fr/2015ISAL0106/document.

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Dans les dernières décennies, la surveillance vibratoire des machines tournantes a acquis un intérêt particulier fournissant une aide efficace pour la maintenance dans l'industrie. Aujourd'hui, de nombreuses techniques efficaces sont bien établies, ancrées sur des outils puissants offerts notamment par la théorie des processus cyclostationnaires. Cependant, toutes ces techniques reposent sur l'hypothèse d’un régime de fonctionnement (c.à.d. vitesse et/ou charge) constant ou éventuellement fluctuant d’une façon stationnaire. Malheureusement, la plupart des machines surveillées dans l'industrie

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33

D'Elia, Gianluca <1980&gt. "Fault detection in rotating machines by vibration signal processing techniques." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2008. http://amsdottorato.unibo.it/952/1/Tesi_Delia_Gianluca.pdf.

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Machines with moving parts give rise to vibrations and consequently noise. The setting up and the status of each machine yield to a peculiar vibration signature. Therefore, a change in the vibration signature, due to a change in the machine state, can be used to detect incipient defects before they become critical. This is the goal of condition monitoring, in which the informations obtained from a machine signature are used in order to detect faults at an early stage. There are a large number of signal processing techniques that can be used in order to extract interesting information fro

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34

D'Elia, Gianluca <1980&gt. "Fault detection in rotating machines by vibration signal processing techniques." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2008. http://amsdottorato.unibo.it/952/.

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Machines with moving parts give rise to vibrations and consequently noise. The setting up and the status of each machine yield to a peculiar vibration signature. Therefore, a change in the vibration signature, due to a change in the machine state, can be used to detect incipient defects before they become critical. This is the goal of condition monitoring, in which the informations obtained from a machine signature are used in order to detect faults at an early stage. There are a large number of signal processing techniques that can be used in order to extract interesting information fro

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35

Mulder, William Alexander. "Dynamics of gas in a rotating galaxy." [Leiden] : Sterrewacht Leiden, 1985. http://catalog.hathitrust.org/api/volumes/oclc/12129828.html.

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36

Watts, Anna Louise. "The dynamics of differentially rotating neutron stars." Thesis, University of Southampton, 2003. https://eprints.soton.ac.uk/50593/.

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This thesis investigates the effect of rapid accretion and differential rotation on neutron star oscillations. The research is motivated by the fact that vibrating neutron stars are a promising source of gravitational waves. The first part of the thesis is a study of a nascent neutron star accreting supernova remnant material. We model an unstable r-mode oscillation that leads to the emission of gravitational waves, and the torques and heating associated with rapid accretion onto a star with a magnetic field. We consider the consequences for both gravitational wave emission and the rotation ra

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37

Jiffri, Shakir. "Advanced passive and active methods for vibration control in rotating machines." Thesis, University of Nottingham, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.582112.

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Effective control of vibration in rotating machinery is a major concern in many industries and research institutions. With the ever-increasing drive for higher operating speeds, the need for developing vibration mitigation methods that cater for the arduous operating conditions that consequently arise is paramount. Phenomena that may have been insignificant in relatively low-speed rotating machines begin to gain importance with increasing speed, an example of which is the gyroscopic effect. This thesis is aimed at enriching the knowledge base on rotordynamic vibration control. Independent Moda

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38

Neill, Gary David. "PC based diagnostic system for the condition monitoring of rotating machines." Thesis, Heriot-Watt University, 1998. http://hdl.handle.net/10399/1266.

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39

Zhu, Hui. "Partial discharge propagation, measurement, and calibration in high power rotating machines." Thesis, Glasgow Caledonian University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.261609.

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40

Hargreaves, Philip Alexander. "Advanced performance prediction tools for the analysis of rotating electrical machines." Thesis, University of Newcastle upon Tyne, 2015. http://hdl.handle.net/10443/2853.

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This thesis seeks to advance the design tools for electrical generators. It aims to undertake an electrical generator’s design, using the Finite Element method within a defined time frame. The thesis looks at the history of generator design systems and outlines the parameters a designer must predict. These parameters are then duly calculated using various finite element methods. The thesis introduces a Pseudo Rotating Superposition system, which allows large quantities of data to be found from single static finite element simulations. Initially the system is used to predict machine saturation

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41

TABRIZI, ZARRINGHABAEI ALI AKBAR. "Development of new fault detection methods for rotating machines (roller bearings)." Doctoral thesis, Politecnico di Torino, 2015. http://hdl.handle.net/11583/2598388.

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Abstract Early fault diagnosis of roller bearings is extremely important for rotating machines, especially for high speed, automatic and precise machines. Many research efforts have been focused on fault diagnosis and detection of roller bearings, since they constitute one the most important elements of rotating machinery. In this study a combination method is proposed for early damage detection of roller bearing. Wavelet packet transform (WPT) is applied to the collected data for denoising and the resulting clean data are break-down into some elementary components called Intrinsic mode funct

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42

Jones, Leslie Braziel Raines Brian Edward. "Adding machines." Waco, Tex. : Baylor University, 2009. http://hdl.handle.net/2104/5311.

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43

Wood, Graeme Brendon. "The quantification of airflows generated by rotating rollers in wool carding machines." Thesis, University of Canterbury. Department of Mechanical Engineering, 2001. http://hdl.handle.net/10092/2281.

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The properties of fibres make them easily manipulated by aerodynamic forces. The carding machine, used in cotton and wool processing, is an example of equipment that creates aerodynamic forces due to fast rotating cylinders with rough surfaces. These forces are generally seen as an undesirable side effect in fibre processing machinery, exacerbated with modern equipment using faster rotating components. This work attempts to quantify these aerodynamic forces on carding machines used in the wool industry. A combination of boundary layer theory, experiments using hot wire anemometry and flow visu

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44

SOAVE, Elia. "Diagnostics and prognostics of rotating machines through cyclostationary methods and machine learning." Doctoral thesis, Università degli studi di Ferrara, 2022. http://hdl.handle.net/11392/2490999.

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In the last decades, the vibration analysis has been exploited for monitoring many mechanical systems for industrial applications. Although several works demonstrated how the vibration based diagnostics may reach satisfactory results, the nowadays industrial scenario is deeply changing, driven by the fundamental need of time and cost reduction. In this direction, the academic research has to focus on the improvement of the computational efficiency for the signal processing techniques applied in the mechanical diagnostics field. In the same way, the industrial word requires an increasing attent

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45

Noakes, Caroline. "The dynamics of liquid films on rotating surfaces." Thesis, University of Nottingham, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368933.

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46

Hain, Roger Mark. "Nonlinear dynamics of a rotating, extending spacecraft appendage." Thesis, Massachusetts Institute of Technology, 1988. http://hdl.handle.net/1721.1/34038.

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47

Hartono, Dennis. "Development of time-frequency analysis for extraction of dynamic characteristics for rotating machinery and bridge structures." Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/52358/.

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This work is aimed at developing a new signal processing technology based on time-frequency analysis to extract the dynamic characteristics of rotating machinery and bridge structure. Therefore, the work can be divided into two parts, the condition monitoring of the gearbox and the structural health monitoring of the bridges. The first part of the work aims: (i) to propose a Joint Time-Frequency Analysis (JTFA) method for gear fault diagnosis by using the combined autoregressive (AR) model-based filtering and Reassigned Smoothed Pseudo Wigner-Ville Distribution (RSPWVD) methods; (ii) to invest

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Mahfoud, Jarir. "Recherches en Dynamique pour un Développement d'Eco Machines Tournantes Réactives - Smart Machines." Habilitation à diriger des recherches, INSA de Lyon, 2009. http://tel.archives-ouvertes.fr/tel-00545388.

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Abstract:

Les machines tournantes sont présentes dans bien de domaines de nos industries et de nos sociétés et jouent un rôle primordial dans le transport et l'énergie. Le contexte actuel d'épuisement de ressources fossiles et la demande continuellement en augmentation d'énergie, font du domaine de la production de l'énergie (qu'elle soit électrique, thermique, éolienne, hydraulique ou nucléaire) un secteur qui concentre une part importante de l'innovation et de l'investissement des institutions et des industriels. Les tendances actuelles concernent l'augmentation du rendement et de la fiabilité, la dim

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Hussain, Tanweer. "Modelling and controlling variation propagation in mechanical assembly of high speed rotating machines." Thesis, University of Nottingham, 2012. http://eprints.nottingham.ac.uk/28465/.

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Assembly plays a vital role in the quality of a final product and has a great impact on the manufacturing cost. The mechanical assemblies consist of parts that inevitably have variations from their ideal dimensions. These variations propagate and accumulate as parts are assembled together. Excessive amount of variations in an assembly may cause improper functionality of the product being assembled. Improving assembly quality and reducing the assembly time and cost are the main objectives of this thesis. The quality of an assembly is determined in terms of variations in critical assembly dimens

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Chapariha, Mehrdad. "Modeling alternating current rotating electrical machines using constant-parameter RL-branch interfacing circuits." Thesis, University of British Columbia, 2013. http://hdl.handle.net/2429/45565.

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Abstract:

Transient simulation programs are used extensively for modeling and simulation of various electrical power and energy systems that include rotating alternating current machines as generators and motors. In simulation programs, traditionally, the machine models are expressed in qd-coordinates (rotational reference frame) and transformed variables, and the power networks are modeled in abc-phase coordinates (physical variables), which represents an interfacing problem. It has been shown in the literature that the method of interfacing machine models and the electric network models plays an impor

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